Cheesy Beef & Macaroni Casserole - Le Coup de Grâce

Ingredients

• 2 lb (900 g) elbow macaroni, cooked ultra al dente (1 minute less than package directions)
• 1 large yellow onion, finely chopped
• 4 cloves garlic, finely chopped
• Olive oil
• 2.5 lb (1.13 kg) lean ground beef
• 1 can (27 oz / 769 ml) diced tomatoes with Italian spices
• 1 cup (250 ml) beef broth
• 1/4 cup (60 ml) tomato paste
• 1 1/2 tbsp (22 ml) Italian seasoning
• 1 tsp (5 ml) dried oregano
• Salt and pepper, to taste
• 14 oz (400 g) shredded mozzarella (about 1 full block)
• 7 oz (200 g) shredded sharp cheddar (about half a block)