Peruvian Tallarines Saltados - cooking recipe

Ingredients

1 lb cooked spaghetti or 1 lb cooked linguine
1 lb beef tenderloin, sliced thinly against the grain (I get the butcher to slice the beef for me)
1 cup soy sauce
1/2 cup white wine vinegar
1 large red onion, cut in wedges
3 -4 tomatoes, cut in wedges,seeds removed
crushed red pepper flakes, to taste.
salt and pepper, to taste
2 tablespoons chopped cilantro

Preparation

Mix the soy sauce and wine vinegar.
Marinate the beef in half the soy and wine vinegar mixture for at least 30 minutes.
Add 2 tablespoons of oil to a heated pan.
Saute marinated beef on high.
Drizzle in the remaining soy mixture.
Season with salt and pepper.
Add the onion, peppers and tomato wedges.
Saute briefly (only about a minute).
Add the cooked spaghetti or linguini and toss with the contents of the pan.
Serve topped with cilantro.