– ¾ pound [0.34 kg] of ground beef
– 1 medium egg
– 1 teaspoon of freshly-cracked black pepper
– ½ small red onion, minced
– ½ cup of breadcrumbs
– 2 garlic cloves, minced
– 2¼ tablespoons of salt,
– ¼ pound [0.11 kg] of low-moisture mozzarella cheese, diced
– 3 tablespoons of vegetable oil,
– 2 cups of tomato sauce
– ⅓ teaspoon ground oregano
– Boiling salted water
– 12 ounces [0.34 kg] of penne,
– ¼ cup of freshly grated parmesan