Asparagus Ham Quiche

1 (10 ounce) package frozen cut asparagus 1/4 cup chopped onion
8 ounce cooked ham, chopped 3 eggs
4 ounce Swiss cheese, shredded (1 cup) 1 cup milk
3/4 cup Bisquick
1/8 teaspoon black pepper

Preheat oven to 375 degrees. Spray a 9 inch pie plate with nonstick cooking spray. Layer asparagus, ham, cheese and onion in prepared pan. Beat eggs in a medium bowl; add milk, Bisquick an pepper. Pour over asparagus mixture. Bake 35 to 45 minutes or until knife inserted in center comes our clean. Cool 5 minutes; cut and serve.