Beefsteak Rancheros

Today we had to have tires put on our truck, so while that was being done, we went with Tate and Shirley to Mierta's Tacos. It is a little authentic Mexican place right beside the tire place.
Pops and I wanted to be faithful to our diet so after questioning the waitress we ordered Beefsteak Rancheros. It came with beans and rice and 2 flour tortillas, but we passed on all that.
It was so good. I had to look for the recipe so here it is:
QUICK MEXICAN STEAK RANCHEROS

2 lb. beef, steak or roast, thinly sliced
2 med. tomatoes (chopped)
1 med. onion (chopped)
3 sm. serrano peppers
1/2 tsp. salt
1 tsp. New Mexico pepper (found in Mexican section of grocery)
2 tbsp. oil
Pepper to taste
1/2 c. water
Brown beef in oil in heavy skillet or Dutch oven. Add remaining ingredients and cook covered for 1/2 hour on medium heat. Uncover and cook until approximately 1/2 liquid is gone. Serve with rice, refried beans, flour tortillas and cilantro for garnish. Serves 4.