3 cups flour (white and wholemeal)
1 teaspoon salt
1 flat teaspoon soda
3 tablespoons margarine
1 cup sour milk/yogurt.
Cut into squares or rectangles, prick with a fork, sprinkle with salt.
Bake 375 degrees for 10 - 12 minutes until dry.
Cool on a wire rack.
Makes about 3 - 4 trays.