1 heaping tbsp. yeast
1 1/2 c. tepid water
3 or 4 c. whole wheat flour

Dissolve yeast in warm water. Stir in 2 cups whole wheat flour. Beat 50 vigorous strokes. Add rest of flour. Knead until elastic. Make 10 balls. Roll out to 5 inch diameter, 1/4 inch thick. Cover and let rise for 45 minutes. Won't rise much.

Preheat oven to 500 degrees. Put 1 or 2 at a time on ungreased cookie sheet or in black skillet. Put as close to heat element as possible. Bake 5 minutes. No need to turn them. They will rise and be hollow in the middle.

To serve, cut off one edge and fill with any filling desired--taco sauce, meat, vegetables, lettuce.