Email to Amy Beef: Sirloin Tip Casserole Source of Recipe awsum34 List of Ingredients 2 pounds sirloin tips 1 can campbells golden mushroom soup 1 package onion soup mix 6 medium red potatoes Instructions Combine mushroom soup, onion soup mix and meat. Place in crockpot. Place potatoes on top of meat, turning once to cover with soup mixture. Cook on low 7 to 9 hours.