Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      cups          pillsbury crescent rolls
   8      ounces        sour cream
   1 1/2  tablespoons   prepared horseradish
     1/4  teaspoon      salt
     1/8  teaspoon      pepper
   2      cups          fresh mushrooms -- chopped
   1      cup           chopped -- seeded tomatoes
   1      cup           small broccoli florets
     1/2  cup           chopped green peppers
     1/2  cup           chopped green onions

Preparation:

1>. Heat oven to 375 deg.F. Separate dough into 4 long rectangles. Place rectangles crosswise in an ungreased 15 x 10 x 1-inch baking pan; presss over bottom and 1 inch up the sides. Seal perforations. Bake 14 to 19 minutes or until golden brown. Cool completely. 2>. Blend sour cream, horseradish, salt and pepper until smooth. Spread evenly over crust. Top with remaining ingredients. Cut into appetizer-size pieces. Refrigerate.