Cheesy Sausage Breakfast Casserole

Name: Cheesy Sausage Breakfast Casserole
Ingredients: 1 onion, chopped; 1 bell pepper, cored, seeded and chopped; 2 cloves garlic, very finely chopped; 6 large eggs; 21/2 cups milk; 1 tablespoon chopped fresh sage; 1 tablespoon chopped fresh flat-leaf parsley; 12 ounces white bread, cubed (about 1/2 loaf); 1/2 cup grated Cheddar cheese (about 2 ounces); Coarse salt and freshly ground black pepper; 2 teaspoons canola oil, plus more for the dish; 1/2 pound pork or turkey country sausage, casings removed