Preheat oven to 350°.
Combine all ingredients except 1/2 cup cheddar cheese in medium bowl. Spoon into 2-quart casserole, then top with remaining 1/2 cup cheddar cheese.
Bake 35 minutes or until heated through. Serve, if desired, with toasted french baguette rounds, sliced garlic bread, corn or tortilla chips or vegetable dippers.
Spanakopita Dip: Use feta cheese instead of cheddar. Spoon into mini phyllo cups and bake 8 minutes or until filling puffs.