
Start by placing the beef liver in a large skillet over medium to low heat with hot vegetable oil and fry until lightly golden brown.
Remove from the heat and cut all the liver into smaller pieces.
Transfer to a large bowl, add the eggs and the milk.
Season with the salt, the black pepper and the oregano.
Add the baking powder, the wheat flour, the grated mozzarella cheese and mix everything very well.
Transfer everything to a medium baking dish and spread it out evenly.
Add the zucchini sliced into rounds on top of everything, the red bell pepper cut into strips and the grated mozzarella cheese.
Place in a preheated oven at 180° C (350° F) and bake for 30 minutes.
Serve.