A recipe for low-calorie and protein-packed seared tuna

Take two thin slices (we took one slice and cut it in half) of wholemeal bread (preferably chestnut)

Chop the purple onion and gherkins

Mix together with the filtered tuna and mayonnaise

Add salt and pepper to taste

Put a slice of yellow cheese on each slice of bread

Spread the tuna mixture inside

Sear in a pan on both sides until the cheese melts and the toast is brown

With appetite!