No-Peek Beef Tips (Great in the slow cooker too) 2 lbs stew meat, one can cream of mushroom soup, one packet brown gravy, one envelope beefy onion soup mix, and one can of water. Mix together in a 13x9 pan and cover with foil. Bake at 300 for 3 hours. No peeking! Meat is super tender and delicious. Serve with mashed potatoes or noodles.