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Egg, quark and caper open sandwich on rye

Chopped egg bound with quark and mustard, with capers, on rye.

By The foodose editorial team. Nutrition calculated from USDA FoodData Central. Checked on paper on 22 September 2026; not yet cooked in a test kitchen or photographed, so the times and yield are estimates. How we develop our recipes
What still needs a real kitchen
  • Confirm 9 minutes gives a fully set yolk for medium eggs from the fridge
  • Photograph the finished open sandwich
Time
About 22 min
estimated
Serves
2
see below
Energy
325 kcal
per serving
Protein
25 g
per serving
Jump to recipe
Not yet photographed. The panel names the dish’s main ingredients rather than showing a picture we have not taken.

Ingredients for 2 servings

2 servings

Check off ingredients as you go.

Contains eggs, gluten, milk, mustard. Check the labels on packaged ingredients:

  • Dijon mustard. Many Dijon mustards also declare sulphites; check the label.
  • capers. Capers are packed in salted brine or vinegar. Rinsing them lowers the salt; the figure here is for drained capers as the record gives them.
  • rye bread. Most rye bread also contains wheat; check the label.

Cooking steps

  1. Bring a pan of water to the boil, lower in the eggs and cook for 9 minutes, then cool them under cold water and peel.

    Cooked when: the whites are set and the yolks are firm.

  2. Rinse the capers under cold water and drain them.

  3. Mix the quark with the Dijon mustard in a bowl until smooth.

  4. Chop the eggs roughly, into pieces rather than to a paste, and fold them into the quark with the capers and the chopped chives.

  5. Lay the spinach leaves over the rye bread and pile the egg mixture on top.

The useful detail

Chop the eggs rather than mashing them. Mashed, the whole thing becomes a uniform paste; chopped, you still get white and yolk separately, which is the difference between a sandwich and a spread.

Make it work for you

One serving is One slice of rye with half the egg mixture. You can switch to a smaller portion in the ingredients above; it is three quarters of this, and it contains correspondingly less energy and protein. It is an option, not a goal.

  • Greek yoghurt instead of quark

    Looser, so drain it for 10 minutes first or the topping runs.

    Per serving: about the same energy, about the same protein, about 1 g more fat.

  • Sourdough instead of rye

    Lighter; rye holds a wet topping better.

    Per serving: about 5 kcal more, about 1 g more protein, about the same fat.

  • Gherkins instead of capers

    Sweeter and crunchier, and much less salty. Nutrition is not recalculated.

Estimated nutrition

Per standard serving, calculated from the ingredients above. Nutrition changes with substitutions, brands and how much oil stays in the pan.

A lunch where eggs and quark together carry the protein, and the quark stands in for the mayonnaise the original relies on.

Nutrition per serving
Energy325 kcal
Protein25 g
Fat12 g
of which saturates4 g
Carbohydrate29 g
of which sugars4 g
Fibre4 g
Sodium940 mg
Show calculation notes

Each ingredient’s weight is multiplied by its USDA FoodData Central values per 100 g. The whole recipe is added up and divided by 2. Raw weights are used for meat, fish and vegetables; beans and lentils are drained weights. All of the oil is counted as eaten. Added salt is not included; sodium from stock, bread, cheese and tinned food is.

Calculation, whole recipe
IngredientWeight usedSourceEnergyProtein
eggs200 gFDC 171287Egg, whole, raw, fresh286 kcal25.1 g
quark150 gFDC 172181Cheese, cottage, nonfat, uncreamed, dry, large or small curdFoodData Central has no quark record. Calculated as dry-curd cottage cheese, the closest fresh unripened curd cheese it holds; the two are close in energy and protein, and your pot's label is the exact figure.108 kcal15.5 g
Dijon mustard10 gFDC 2710085Mustard7 kcal0.4 g
capers15 gFDC 172238Capers, canned3 kcal0.4 g
chives10 gFDC 169994Chives, raw3 kcal0.3 g
spinach50 gFDC 168462Spinach, raw12 kcal1.4 g
rye bread90 gFDC 172684Bread, rye233 kcal7.7 g
Whole recipeDivided by 2652 kcal50.8 g

Per serving the energy is rounded to the nearest 5 kcal, grams to the nearest whole gram and sodium to the nearest 10 mg. Calculation method 1.0, September 2026. How the calculation works.

Storage and reheating

In the fridge
Keep the egg mixture covered in the fridge for up to 2 days and assemble on the bread only when you eat.
Reheating
Not needed; this is a cold dish.

Checked against US Food and Drug Administration, Refrigerator and Freezer Storage Chart, USDA Food Safety and Inspection Service, Leftovers and Food Safety, FoodSafety.gov, Safe Minimum Internal Temperatures and FoodSafety.gov, Cold Food Storage Chart. UK guidance from the Food Standards Agency is shorter, at two days for most leftovers.

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