Heat oven to 400F. Grease pie plate, 10x1 1/2" inches. Sprinkle ham, cheese nad onions in plate. Beat remaining ingredients till smooth, 15 seconds in blender or 1 minute with hand beater. Pour into plate. Bake till golden brown or till knife inserted in centre comes out clean, 35 to 40 minutes. Cool 5 minutes. From _The Best of Bisquick_