1. Grease the inside of 3 small load pans (3x6 in.) or 1 regular bread pan with shortening. 2. Beat bananas to a pulpy foam, add baking soda, stir well and set aside. 3. Cream together in a large mixing bowl the yogurt, margarine, honey, and sugar. Beat in egg. Add the remaining ingredients and the banana mixture. 4. Place the dough in the pan(s) and bake in a pre-heated oven at 350°F. for about an hour. Let cool in the pan for a little while, then turn out on a rack.