Separate eggs. Refrigerate the egg whites. Stir flour, egg yolk, milk, 1 pinch each of salt and nutmeg until smooth. Let the dough swell for at least 20 minutes.
Clean and wash the spinach. Finely chop 4-5 large leaves. Wash and quarter the tomatoes. Peel onion and garlic. Dice onion, slice garlic
Melt the butter and let it cool down a little. Beat egg whites until stiff. Stir butter and chopped spinach into the dough. Fold in the beaten egg white. Heat 1-2 tbsp. oil in a large coated pan. Bake the dough in it from both sides until golden brown. Tear into pieces with 2 spatulas and continue to bake briefly
Meanwhile, sauté the onion and garlic in 1 tbsp. hot oil in the pot. Steam the tomatoes. Add the spinach leaves and let them collapse. Season with salt and pepper. Grate cheese. Arrange everything and sprinkle with cheese