Linguine Gratinées with Meatballs and Tomato Sauce

1. Make the meatballs:
   • Preheat your oven to 375°F (190°C).
   • In a large mixing bowl, combine the ground meat, breadcrumbs, Parmesan cheese, egg, garlic, parsley, oregano, salt, pepper, and milk. Mix until well combined but do not overwork the meat.
   • Shape the mixture into small meatballs, about 1-1.5 inches in diameter, and place them on a baking sheet lined with parchment paper.
   • Bake the meatballs in the preheated oven for 20-25 minutes, until they are cooked through and lightly browned on the outside. Remove from the oven and set aside.
2. Prepare the tomato sauce:
   • In a large skillet, heat the olive oil over medium heat. Add the chopped onion and cook for 3-4 minutes, until softened.
   • Add the minced garlic and cook for another 1 minute until fragrant.
   • Stir in the crushed tomatoes, tomato paste, dried basil, and sugar (if using). Bring to a simmer, then reduce the heat and let it cook for 15-20 minutes, stirring occasionally. Season with salt and pepper to taste.
3. Cook the linguine:
   • While the sauce is simmering, bring a large pot of salted water to a boil. Add the linguine and cook according to the package instructions until al dente. Drain the pasta, reserving a little bit of pasta water.
4. Assemble the gratinée:
   • Preheat your broiler on high.
   • In a large baking dish, combine the cooked linguine and tomato sauce. Gently toss the pasta to coat it evenly with the sauce.
   • Add the baked meatballs on top of the pasta, then sprinkle both mozzarella and Parmesan cheese over the entire dish.
   • Place the baking dish under the broiler for 3-5 minutes, or until the cheese is melted and bubbly with a golden-brown crust.
5. Serve:
   • Remove the dish from the oven and let it cool for a couple of minutes.
   • Garnish with fresh basil leaves and serve hot.

This Linguine Gratinées with Meatballs and Tomato Sauce is a perfect dish to serve when you’re craving a comforting meal that’s rich in flavors and textures. The combination of the cheesy gratinéed pasta, savory meatballs, and tangy tomato sauce will satisfy any appetite! Would you like to pair this with a side salad or some garlic bread for even more indulgence?