In a medium bowl, combine ground lamb, bread crumbs, egg, 1/2 tsp garlic powder, 1 tsp onion powder, 1 tsp mixed Italian herbs, 1 tsp salt, and 1/2 tsp pepper.
1 lb ground lamb, 1 egg, 1/4 cup breadcrumbs, 2 tsp onion powder, 1 tsp garlic powder, 2 tsp mixed Italian herbs, 2 tsp salt, 1 tsp ground black pepper
Form 12 equally-sized meatballs, about the size of gold balls. Place them in a 9x13 inch casserole dish.
In a large pitcher, ideally 4 cups, combine the tomato passata, beef stock, Worcestershire sauce, remaining mixed Italian herbs, salt, and pepper. Stir to fully combine.
Pour the tomato mixture over the meatballs. Cover the casserole dish with aluminum foil and bake for 30 minutes.
Meanwhile, boil the spaghetti in salted water until al dente according to the packaging instructions. Slightly undercooked is best as they will be baked further.
12 oz dried spaghetti
Add the cooked pasta to the meatballs. Stir gently to combine. Top with shredded cheese and bake for 5 more minutes or until the cheese is fully melted. Serve immediately!
3/4 cup shredded mozzarella
Notes
Complete meal: Add cooked vegetables such as peas, corn, or carrots alongside the spaghetti to the meatballs and sauce.Spice it up: Add 1/4 tsp of chili flakes to the sauce before baking for some heat and extra flavor.Storage: Store any leftovers in the fridge for up to 3 days in an airtight container. Simply reheat with some extra stock or water to loosen up the pasta. Alternatively, you can freeze this spaghetti casserole for up to 3 months in a freezer-proof container.