[wolfy999]

Altered your ingredient list a bit....will be popping it in the oven shortly and will let you know how it turn out in a couple of hours.

3 medium or 2 large potatoes, peeled and sliced
1 large onion, peeled and sliced
1 cup green pepper, diced
1.5 lbs Tri-Tip steak, cut in 1 inch squares
1 cup beef gravy
3 tbsp tomato sauce
2 tbsps Worcestershire sauce
½ tsp salt
1/2 tsp pepper
1/2 tsp garlic powder

Arrange half the potatoes, onions, and peppers in bottom of a large casserole dish. Layer steak on top, followed by remaining vegetables. In a small bowl, combine remaining ingredients. Pour over casserole. Bake for 2 hours