Beef Stroganoff

10oz sliced mushrooms with juice
10oz condensed cream of mushroom
2 cups sour cream
3 cups water
1/4 cup dry onion flakes
1/4 cup dry beef in a mug soup mix
2 tsp parsley flakes
1/4 tsp paprika
1 tsp pepper
2 tbsp cornstarch
1/2 cup water
4 cups cooked beef cut into bite size peices

In large pot, combine first 10 ingredients. Bring to a boil over medium heat and simmer. Mix cornstarch with water. Stir into simmering sauce, stirring until thickened. Add cut beef, stir to combine. Pour into large casserole or small roaster. Bake uncovered in 350F for 45 minutes or more.