1/2 cup finely chopped onion
4 tablespoons butter or vegetable oil
1/2 cup red chile sauce
8 eggs
Salt and pepper
Trim and clean the cactus pads. Dice each pad, then cover with salted water in a saucepan, and simmer gently until tender, 5 to 10 minutes. Drain in a sieve and rinse under cold water to rid pads of their sticky, okra-like juice.
In a large skillet, sauté the onion in butter or vegetable oil until soft. Add the nopales and red chili sauce and mix well. Break the eggs gently on top of the mixture, cover tightly, and steam until the egg whites are set, 5 to 10 minutes. Season to taste with salt and pepper. Serve directly from the frying pan.