Prepare as above, except add 1/3 cup very finely chopped, well-drained, cooked spinach with the flour.
Chili Powder Tortillas:
Prepare as above, except add 1 tablespoon ancho chili powder or chili powder to the flour mixture (add more water, if necessary).
Prepare tortillas as directed. Stack them, alternating each tortilla with 2 layers of waxed paper. Place tortillas in a freezer bag and freeze up to 6 months. Before serving, thaw at room temperature.