No-peek beef tips for dinner. 2 lbs stew meat, one can cream of mushroom, one packet brown gravy, on...

No-peek beef tips for dinner. 2 lbs stew meat, one can cream of mushroom, one packet brown gravy, one envelope beefy onion soup mix, and one can of water. Mix everything in a 13x9 pan and cover tightly with foil. Bake at 300°F for 3 hours. No peeking! The meat turns out super tender and full of flavor.
Serve over mashed potatoes or noodles.