Green Beans, Tomatoes and Mushrooms

1 lb Green beans;
1/2 c Shallots; chopped
1 c Tomato; diced
4 oz (1 c) mushrooms; sliced
2 tb Margarine;
2 tb Olive oil;
Salt and freshly ground -pepper

Remove ends from beans. Leave beans whole or cut crosswise into 1" pieces.
Place beans in 1" salted water (1/2 ts salt to 1 c water).
Bring to a boil and cook uncovered for 5 minutes.
Cover and cook until tender, 5 to 10 minutes longer.
Drain beans, turn into a warm bowl, and set aside.
Cook and stir shallots, tomato and mushrooms in margarine and oil until mushroom are tender, about 4 minutes.
Season with salt and pepper to taste.
Add vegetable mixture to beans and toss.