Pesto Meatball Bake

Preheat the oven to 350 degrees F (175 degrees C). Lightly spray a 9x13-inch baking pan with cooking spray.

Bring 3 quarts water and beef bouillon to a boil in a large pot.

Meanwhile, mix beef, bread crumbs, Parmesan cheese, and garlic in a bowl. Form into 16 meatballs.

Drop penne into the boiling water; cook for 4 minutes. Add meatballs to the pot; cook until penne is tender, about 8 minutes more. Drain penne and meatballs, reserving 1 1/2 cups cooking water.

Spread penne and meatballs in the prepared baking pan. Whisk pesto into the reserved cooking water and pour on top. Use 2 spoons to mix thoroughly. Spread mozzarella cheese evenly over the top.

Bake in the preheated oven until cheese is melted and meatballs are no longer pink in the centers, about 15 minutes.