Sauce
Into a bowl, add the ground beef, the onion chopped into dices, the eggs, the salt, the black pepper, the sweet paprika, the oregano, the chimichurri and the breadcrumbs, mix all the ingredients very well until combined.
Cover the bowl with plastic wrap and leave it in the fridge for about 1 hour.
After this indicated time, get a chunk of meat and round it by hand forming a ball.
Flatten the meat slightly, get a small, boiled potato and place it in the center of the meat mixture, then close the meat by covering the potato with it until it forms a ball.
Repeat this process until you’ve used up all the meat, it was enough to make 6 meatballs.
Put the meatballs into a large round baking tin and add a drizzle of olive oil all over them, also sprinkle a pinch of paprika over each meatball.
Bake in a preheated oven at 180°C (356°F) for about 20 minutes.
Meanwhile, into a skillet, add a drizzle of olive oil, the onion chopped into dices, the bell peppers chopped into dices, then add the salt and the black pepper, stir and cover the skillet, let all the ingredients cook for 5 minutes.
After this indicated time, add the diced garlic cloves and the tomato sauce, stir again and add the oregano. Stir and let all the ingredients cook for another 5 minutes.
Once the meatballs have baked through, pour all the sauce over them and sprinkle the grated mozzarella cheese over each meatball.
Bake in a preheated oven again for another 10 minutes.
Top with parsley to taste.
Serve.