Brown the sausage and onion in a skillet. Drain well and cool slightly. Combine the browned mixture with cheese, egg and seasoning. Mix all ingredients together until you have a fairly thick batter. Put this mixture in a greased 9? square pan, 8?, or you can even make muffins with it. Brush top with 1 beaten egg yolk mixed with 1 tablespoon water. Bake at 400° for about 30 minutes or until nicely browned.
If you freeze for later use, wrap in individual pieces of plastic wrap and put in Ziploc bag. When you want a snack, just pop in the microwave. Also can be made into muffins.