Heat oven to 350°. Spray pie plate, 9x1 1/4 inches, with nonstick cooking spray. Sprinkle onion and cheese in bottom of pie plate. Place remaining ingredients except salsa in blender. Cover and blend on medium-high speed about 30 seconds or until smooth. Pour into pie plate. Bake about 40 minutes or until knife inserted in center comes out clean. Let stand 5 minutes. Cut into wedges. Serve with salsa.
1 Serving: Calories 100 (Calories from Fat 20); Fat 2g (Saturated 1g); Cholesterol 5mg; Sodium 470mg; Carbohydrate 13g (Dietary Fiber 2g); Protein 9g.
From "Betty Crocker's Best of Healthy & Hearty Cooking." Text Copyright 1998 General Mills, Inc. Used with permission of the publisher, Wiley Publishing, Inc. All Rights Reserved.