Impossible cheddar and broccoli appetizers

10 oz Frozen chopped broccoli*
      8 oz Whole kernal corn; drained
    1/4 c  Onion; chopped
    1/2 c  Walnuts; coarsely chopped
    1/2 c  Milk
    1/4 c  butter; melted
      2    Eggs
    1/2 c  Bisquick
    1/4 ts garlic salt
      1 c  Cheddar cheese; shredded
 
  *Thaw and drain the broccoli.  Heat oven to 375.
   Grease a 9x9x2" pan. Mix broccoli, corn, onion and
  walnuts.  Place in pan.  Beat remaining ingred. except
  cheese until smooth, 15 sec. in blender on high,
  stopping blender frequently to scrape sides if
  necessary, or 1 min. with electric mixer on high.
   Pour evenly into pan.  Bake until knife inserted in
  center comes out clean, 23-25 min.; sprinkle with
  cheese.  Bake until cheese is melted, 2-3 minutes
  longer.  cool 30 minutes.  Cut into triangles or
  squares.  Makes 30 appetizers.