Just made this today because I had way too many portabello mushrooms.

SERVES 4

Ingredients
1 1/2 cups white button mushrooms, chopped. (6 oz. or so)
3 large portabella mushroom caps (about 3/4 a pound (or more)
2 tablespoons butter
1/2 cup vegetable broth
1 tablespoon ketchup
1 garlic clove, minced
1/2 teaspoon salt
1/4 cup onion, chopped
1 1/2 tablespoons flour
1 teaspoon vegetable seasoning
1/2 cup sour cream or plain yogurt or soy yogurt

Directions

1Chop portobello caps into 1 inch cubes.
2Saute mushrooms (both types) in butter in skillet over medium-low heat for 5-10 minutes.
3Add the vegetable broth, ketchup, onions, garlic, and salt to skillet.
4Heat to boiling, reduce heat, and simmer uncovered for 5 minutes.
5Cover and simmer about 5 minutes more.
6Mix vegetable seasoning and flour in a small container.
7Add flour mixture gradually into mushroom mixture, stirring constantly.
8Boil and stir 1 minute more.
9Reduce heat to low and stir in sour cream (or alternative).
10Serve over noodles (or rice, but I prefer noodles, especially yummy egg noodles!).