1Heat oven to 350°F. Spray 10-inch skillet with cooking spray; heat over medium-high heat. Cook sausage and onion in skillet 4 to 5 minutes, stirring occasionally, until onion is tender. Spoon into ungreased 13x9-inch (3-quart) glass baking dish. Stir in garlic salt, chili powder, tomatoes and beans.
2In medium bowl, stir remaining ingredients until blended. Pour over sausage mixture.
3Bake 35 to 40 minutes or until crust is light golden brown.