Beef with grapes

4 medium red potatoes, each cut into 8 wedges 1/4 cup water 1/2 red onion , thinly sliced 1 lb roast beef 1 pint grape tomatoes , cut in half lengthwise 9[...]

1/2 cup milk 1/3 cup grape nuts cereal 1 tablespoon soy sauce 1/4 teaspoon salt 1 dash pepper 1 lb ground beef 1 (1 ounce) package mushroom gravy mix 1[...]