Green Pepper Steak Casserole

1 1/2 lbs lean boneless round steak(cut in thin strips)
1 10oz can of condensed onion soup
1 14 oz can of diced tomatoes
1/2 cup onion chopped
1 green pepper(seeded and cut in thin strips)
2 cups sliced mushrooms
1 tbs. light soy sauce

Put steak strips in a fry pan,cook until browned.
Put into a 2 quart casserole dish.
Mix the remaining ingredients and pour over meat, stir.
Cover.
Bake at 350F for 1 1/2 to 2 hours or until meat is tender.
Makes 5 cups