- Easy
- 30 min
- 2 serv.
- 14 synergies
- Now at its best: Tomato
Elevated Dutch healthy sandwich with grilled chicken, avocado, hard-boiled egg and fresh vegetables on whole grain bread. A hearty lunch to take along or enjoy at home.
The broodje gezond is the sandwich everyone in the Netherlands knows but nobody orders anymore. Unjustly, because this version is everything a lunch should be. Toasted whole grain bread, a layer of mashed avocado with lime and pepper, crisp lettuce, thick slices of tomato and cucumber, red onion rings, slices of hard-boiled egg, and on top tender grilled chicken breast. The mustard adds sharpness, the olive oil gives sheen. Keep it open for an uitsmijter-style presentation, or close it up and take it along. Both ways work.
- 15
- min prep
- 15
- min cook
- 30
- min total
Nutritional Synergies
This recipe combines ingredients that enhance each other:
2.6x more lycopene absorption from salad/salsa
Technical: Tomatoes contain lycopene (3-8mg per 100g), a fat-soluble carotenoid with extremely low bioavailability without a fat carrier (<5%). Avocado contains 15g mono-unsaturated fats per 100g that stimulate micelle formation in the gut. Studies show 2.6x higher lycopene absorption when tomato is combined with avocado. Avocado also contains glutathione — a master antioxidant.
What does this mean for you? Guacamole with tomato, avocado toast with tomato, or a caprese with avocado — all these combinations ensure you absorb up to 2.6x more lycopene. Without fat, the lycopene literally slides right through your body.
Immune SystemSkin & Hair
Double dose of healthy fats and choline
Technical: Eggs contain 147mg choline per egg (27% RDA), essential for the neurotransmitter acetylcholine (memory and focus). Avocado also provides choline (14mg/100g) plus monounsaturated fat that increases absorption of fat-soluble vitamins from the egg (A, D, E, K). Together they deliver a double choline dose plus optimal vitamin absorption.
What does this mean for you? Eat avocado toast with a fried or poached egg. More choline for your memory, and the avocado fat helps absorb all vitamins from the egg.
Focus
Lime juice prevents oxidation of avocado
Technical: Avocado's high unsaturated fat content (oleic acid, 10g per 100g) makes it vulnerable to oxidation upon air exposure. Polyphenol oxidase (PPO) oxidizes phenolic compounds into brown melanins. Lime's vitamin C (29mg per 100g) and citric acid work as double protection: vitamin C reduces quinones back, citric acid lowers pH below PPO optimum (pH 5-7), inhibiting the enzyme.
What does this mean for you? Squeeze lime over your avocado in poke bowls, guacamole or salads. The classic Mexican combination protects both color and nutritional value. Lime works slightly milder than lemon but equally effective.
HeartSkin & HairAntioxidants
Vitamin C + olive oil fats for iron absorption and antioxidant action
Technical: Lime's vitamin C (ascorbic acid) improves absorption of non-heme iron from plant sources. Olive oil's fat-soluble polyphenols (hydroxytyrosol) are better absorbed in combination with vitamin C, which acts as an antioxidant keeping the polyphenols stable.
What does this mean for you? Lime-olive oil dressing is a classic combination that helps your body absorb more iron and antioxidants from your salad.
Immune SystemEnergySkin & Hair
Perfect vinaigrette - mustard as emulsifier
Technical: Mustard contains mucilage (slime) acting as a natural emulsifier — it binds oil and vinegar into a stable vinaigrette. Mustard's sinigrin (glucosinolate) converts to allyl isothiocyanate with thermogenic and bioactive action. Olive oil provides oleocanthal and hydroxytyrosol.
What does this mean for you? Mustard vinaigrette is scientifically the perfect dressing. The mustard emulsifies, the olive oil provides polyphenols — and together they taste amazing.
Weight LossHeart
Mediterranean golden rule: fat increases lycopene absorption 4x
Fat significantly increases lycopene bioavailability (PMID: 15927929)
Technical: Tomatoes contain lycopene (3-7mg per 100g), a carotenoid with strong antioxidant action. Lycopene is fat-soluble with only 10-15% absorption without fat. Olive oil increases this to 40-60% (2.5-4x improvement). Cooking further increases lycopene bioavailability.
What does this mean for you? Always add olive oil to tomato dishes — sauces, salads, bruschetta. This is why Mediterranean cuisine is so healthy. Cooked tomatoes with olive oil = maximum lycopene.
HeartSkin & Hair
Fat increases bioavailability of quercetin from red onion
Technical: Red onion contains 32-65mg quercetin per 100g — the richest food source. Quercetin is poorly water-soluble (2μg/mL) but dissolves well in fats. Olive oil increases quercetin oral bioavailability by 50-70% through lipid-based lymphatic transport instead of the portal vein.
What does this mean for you? Sauté red onion in olive oil (soffritto) for maximum quercetin absorption. Oil dissolves quercetin and improves transport to your bloodstream. Caramelizing also enhances flavor.
Anti-inflammatoryHeart
7x better carotenoid absorption with fats
Technical: Lettuce contains 1223μg beta-carotene and 1730μg lutein per 100g. Without fat only 3% is absorbed. A Purdue University study (2012, Molecular Nutrition & Food Research) showed olive oil or avocado increases absorption to 20%+ — a 7-fold improvement.
What does this mean for you? Always eat salad with olive oil dressing or avocado. Without fat you absorb almost nothing of the carotenoids. A dry salad without dressing is ironically less nutritious than one with a good olive oil dressing.
Skin & HairGeneral Wellness
7x better carotenoid absorption with fats
Technical: Lettuce contains 1223μg beta-carotene and 1730μg lutein per 100g. Without fat only 3% is absorbed. A Purdue University study (2012, Molecular Nutrition & Food Research) showed olive oil or avocado increases absorption to 20%+ — a 7-fold improvement.
What does this mean for you? Always eat salad with olive oil dressing or avocado. Without fat you absorb almost nothing of the carotenoids. A dry salad without dressing is ironically less nutritious than one with a good olive oil dressing.
Skin & HairGeneral Wellness
Lutein + lycopene: complementary carotenoids in two phases
Technical: Lettuce contains 1730μg lutein per 100g — a xanthophyll carotenoid filtering blue light in the macula. Tomato contains 2573μg lycopene — a carotenoid neutralizing singlet oxygen. These carotenoids work through different mechanisms and are active in different tissues. With olive oil both are optimally absorbed.
What does this mean for you? A salad of lettuce and tomato with olive oil dressing combines two carotenoid families. Lutein from lettuce is active in the macula, lycopene from tomato in the cardiovascular system. Without dressing you barely absorb anything — fat is essential.
HeartGeneral Wellness
Complex carbs + healthy fats for lasting satiety
Technical: Whole grain rolls provide slow carbohydrates (GI ~55) and B-vitamins (thiamine 0.4mg, niacin 4.7mg). Avocado adds 15g monounsaturated fats and 7g fiber per 100g. Studies show the combination of complex carbs + avocado fat extends satiety by 40% via cholecystokinin (CCK) and peptide YY signaling.
What does this mean for you? Avocado on whole grain bread is a classic for good reason — it's one of the most satiating breakfast combinations. Add a pinch of sea salt and chili flakes for extra flavor.
EnergyWeight LossHeart
Complex carbs + complete protein for sustained energy
Technical: Whole grain rolls provide slow glucose from starch plus B-vitamins for energy metabolism. Eggs offer complete protein (6g per egg, PDCAAS 1.0) with all essential amino acids plus choline (147mg). The combination stabilizes blood sugar as protein modulates insulin response, while B-vitamins from both sources support mitochondrial energy metabolism.
What does this mean for you? An egg on whole grain bread is the perfect breakfast for stable energy all morning. The protein from the egg slows the absorption of carbohydrates from the bread.
EnergyMuscle GainFocus
Whole grain fiber + oleic acid slow glucose absorption
Technical: Whole grain rolls contain 6-8g fiber per 100g that slow gastric emptying. Olive oil's oleic acid (73%) activates the ileal brake mechanism via GLP-1 secretion, reducing glycemic response by 20-30%. The combination of insoluble fiber + monounsaturated fat creates a double inhibitory effect on carbohydrate digestion.
What does this mean for you? Dip your whole grain roll in good olive oil instead of butter. Your blood sugar rises much more gradually, keeping you satisfied longer without energy crashes.
Blood SugarEnergyHeart
Fat increases piperine absorption and enhances polyphenols
Technical: Piperine is fat-soluble and absorbed 2-3x better with dietary fat. Olive oil's oleocanthal and piperine both modulate COX signal transduction through different mechanisms, providing additive bioactive effect.
What does this mean for you? Grind fresh pepper over salads with olive oil dressing. The combination enhances both pepper absorption and bioactive action.
Anti-inflammatoryHeartDigestion
Ingredients (12)
+9 more ingredientsInstructions
- 1 Season chicken with pepper and grill 6 min per side until done. Slice.
- 2 Mash avocado with lime juice, pepper and salt.
Nutrition per serving
Indicative values per serving.
Timing & Suitability
Shelf life: 1 days in fridge
Tags & Diet
Allergens: Gluten, Eggs