Start by placing the beef liver in a Ziplock bag.
Place it in the microwave and cook it on high power for 7 minutes.
After this time has passed, cut the liver into smaller pieces and set aside.
In a large skillet over medium to low heat, add a drizzle of olive oil.
Add the onion chopped into cubes, the grated carrot, the grated zucchini and sauté these vegetables until they slightly soften.
Season them with a pinch of black pepper, the sweet paprika and sauté for 2 more minutes.
Now, in a large bowl, add the eggs, parsley to taste, the salt and whisk everything very well to combine.
Next, add the sautéed vegetables we prepared earlier, the liver, the wheat flour and mix everything very well until combined.
In a large skillet over medium to low heat, add a drizzle of olive oil.
Add the mixture we prepared and spread it evenly.
Cover the skillet and let it fry for 10 minutes.
After this time has passed, add the grated mozzarella cheese.
Cover the skillet again and let it fry until the cheese is fully melted.
Serve.