½ cup
freshly grated Parmesan cheese, plus more for serving
¼ cup
finely chopped fresh flat-leaf parsley leaves, plus more for garnish
1 large
eggs, beaten
4
garlic cloves, minced
1 ½ teaspoons
kosher salt
1 teaspoon
freshly cracked black pepper
1 (24- to 32-ounce) jar
marinara sauce
4 tablespoons (½ stick)
salted butter, softened
Method
Preheat the oven to 350°F with a rack in the center position. Line a rimmed sheet pan with foil.
In a large bowl, combine the beef, sausage, breadcrumbs, Parmesan, parsley, eggs, garlic, salt, and pepper. Mix well, then with wet hands, form golf ball–size meatballs (about 2 tablespoons each) and place on the prepared sheet pan. You should have about 15 meatballs. Arrange them on the prepared baking sheet. Bake for about 25 minutes, or until browned and cooked through.
Meanwhile, combine the butter and marinara in a small saucepan over medium heat. Cook until the butter is melted and the marinara is warmed through, about 5 minutes.