Lasagna with roast

8 ounces dry lasagna noodles (10 pieces) 1 lb mild sausage 1 medium onion , chopped into 1/2-inch pieces 4 small garlic cloves , minced 1/4 cup mozzarella[...]

2 teaspoons olive oil 1 1/2 lbs Italian sausage 3 cups chopped onions 4 garlic cloves , minced 2 teaspoons dried oregano 1/2 teaspoon crushed red pepper[...]