In a skillet, add one drizzle of olive oil, add the red onion chopped into thin strips and spread well, add the eggs, one pinch of salt, the black pepper, chopped parsley to taste and one hotdog sausage chopped into small cubes, mix all the ingredients gently.
Then turn the heat to low, cover the skillet and let it all fry for 3 minutes.
After this indicated time, add the slices of mozzarella cheese.
Cover the skillet again and let it all fry until the mozzarella cheese has fully melted.
After that, another hotdog sausage chopped into small cubes and chopped parsley to taste.
Cover the skillet again and let it all fry for another 2 minutes.
Serve.