When my baby, Dina was born I hemorrhaged. As a result I was on a high protein and high iron diet. This sandwich became a habit and eventually an addiction.
Heat vegetable oil in a pan to sizzling. Turn heat to medium-low. Add two eggs, break the yolks. Salt and pepper to taste. Fry until whites are opaque, then flip. Cook through, adding a slice of cheese (Jong-Belegen) the last minute to melt. Toast wheat bread and butter (if desired) - add the fried egg-cheese and top with fresh spinach. Cut in half and serve immediately
Double the amount of spinach if you like. Or add tomatoes. Or sliced red pepper. Or sliced cukes. Or whatever you have!