6 oz. shredded extra-sharp cheddar cheese, about 1 1/2 cups
Kosher salt and freshly ground black pepper, to taste
3/4 cup heavy cream
1 (15-ounce) can tomato sauce
2 cups beef stock
2 tbsp. all-purpose flour
1 1/2 tsp. Italian seasoning
2 cloves garlic, minced
1/2 medium sweet onion, diced
1 pound ground beef
1 tbsp. olive oil
8 oz. medium pasta shells