Roast Beef With Mushroom Sauce

Photo: flickr user avlxyz

Ingredients

2 tablespoons butter

3/4 cup onion, thinly sliced

1/4 pound fresh mushrooms, sliced

1/4 teaspoon ground marjoram

1/4 teaspoon garlic salt

pepper to taste

1/4 cup ketchup

8 slices leftover cooked roast beef

In a skillet, melt butter over medium heat. Saute onion for 5 minutes. Add mushrooms and saute 2 to 3 minutes. Stir in the flour and seasonings. Add broth and ketchup. Bring to a boil, stirring constantly. Reduce heat to low; simmer 10 minutes. Add beef and heat through. Yield 4 servings.