Step 1 Beat eggs, combine with grated parmesan and a pinch of salt and pepper.
Step 2 Soak meat slices in the egg mix.
Step 3 In a large pan put the butter and your sliced onion. Cook gently for about 10 minutes and add the tomato puree. Cook this tomato sauce over medium-low heat for about 20 minutes.
Step 4 In the meanwhile, put breadcrums on both sides of your egg-moistened cutlets. Fry them one at a time in EVOO and lay them on some paper in order to absorb as much oil as you can.
Step 5 Add the fried cutlets in the pan with the tomato sauce and cook gently for about 10 minutes.
Note: If you like them, add and cook green-peas together with the tomato sauce.