Homemade Jumbo Meatballs and Spaghetti

For the meatballs:

• olive oil
• 3 cups white Italian style bread cut in 1” dice
• 1 cup whole milk
• 1 ¼ pound ground beef
• 1 pound mild Italian sausage
• 1 egg lightly beaten
• ½ medium onion chopped
• 4 tablespoons dried parsley flakes or 1/2 cup finely minced fresh parsley
• 1 teaspoon dried oregano
• 3 ounces finely grated romano cheese
• 1 cup whole milk ricotta cheese
• 1 ½ teaspoons kosher salt
• ½ teaspoon ground black pepper

For the sauce:

• 4 tablespoons olive oil
• ½ medium onion chopped
• 1 garlic clove minced
• 24 ounces passata or 2 15 oz. cans roma tomatoes
• ½ teaspoon dried oregano
• 5 large basil leaves cut in chiffonade
• ½ teaspoon salt
• ½ teaspoon ground black pepper
• 1 pound Spaghetti