Prepare the Meatball Mixture
Place the diced bread in a large bowl and pour the milk or water over it.
Let the bread soak for 5 minutes, then mash it with a fork until smooth.
Add the ground beef, ground pork, Parmesan cheese, egg, minced garlic, parsley, salt, and black pepper.
Mix gently with your hands until just combined. Avoid overmixing to keep the meatballs tender.
Shape the Meatballs
Line a baking sheet with parchment paper.
Scoop about 2 tablespoons of the mixture per meatball.
With wet hands, roll into 1½-inch balls and place on the prepared baking sheet.
Cook the Meatballs
Option 1: Sauté
Heat olive oil in a large non-stick skillet over medium heat.
Add the meatballs in batches, leaving space between them.
Cook for 6–8 minutes, turning every 2 minutes until evenly browned.
Cook until the internal temperature reaches 160°F (71°C).
Option 2: Bake
Preheat the oven to 400°F (200°C).
Arrange the meatballs 2 inches apart on a lined baking sheet.
Bake for 20–23 minutes or until fully cooked and the internal temperature reaches 160°F (71°C).
For a golden brown finish, broil for the last 2–3 minutes.