Sausage-Mushroom Breakfast Casserole
["2 1/2 c. seasoned croutons", "1 1/2 lb. bulk pork sausage", "4 eggs, beaten", "2 1/4 c. milk", "1 (10 3/4 oz.) can cream of mushroom soup", "1 (4 oz.) can sliced mushrooms", "3/4 tsp. dry mustard", "2 c. (8 oz.) shredded Cheddar cheese", "cherry tomatoes, halved (optional)"]
["Spread croutons in lightly greased 13 x 9 x 2-inch pan.", "Set aside."]
["croutons", "pork sausage", "eggs", "milk", "cream of mushroom soup", "mushrooms", "dry mustard", "Cheddar cheese", "cherry tomatoes"]