Cook spinach according to package directions and drain well, squeezing to remove excess moisture.
Combine with stuffing mix, chopped onion, eggs, margarine, cheese, Cayenne, garlic salt and Creole seasoning. Mix well.
Shape into ¾ inch balls and place on cookie sheet. Bake 15-20 minutes. (The spinach balls can be successfully frozen by placing them on a pan in freezer until hard, then storing in airtight bags. To serve, thaw slightly and bake 20-25 minutes.)