This is a traditional Peruvian dish made with sliced beef, hot chilis, and French fries. 

Ingredients:

Potatoes (4-5) cut as for French Fries, or a frozen bag of french fries

Red Onions (2-3)

Tomatoes (4-5)

Garlic (1 teaspoon of minced)

Very tender meat - go to El Rey and ask for the softest "Filete de Res" they have. (1 kg should serve about 5 people?)

White Rice - calculate about 1 cup of cooked rice per person?

Fresh chopped Parsley

Balsamic Vinegar

Soy Sauce

Aji Amarillo Paste - Secret ingredient - you get it at Bal Harbor in Paitilla (either at the Mini Max, or Foodies, I can't remember). You can also get the actual pepper of Aji Amarillo at Mini-super Corozol sometimes. If so, you are going to have to wash it, get rid of the seeds and chop it finely.

Directions: 

Cut onions long wise in thick segments (maybe eighths)

Cut tomatoes long wise in thick segments (same as onions)

Slice meat in rectangular 1/8 or 1/4 inch thick pieces - marinade with salt, pepper, a little garlic, and a little aji amarillo.

Make rice

Make the French Fries and put them aside

In a large skillet fry garlic and meat for a short time only until it is golden, then get it out - do not overdo it, it will get tough! It is OK if it is not fully done, you will add it to the fire again.

In the same oil/meat juice, fry onions, tomatoes and Aji Amarillo

Add to the stir fry the meat plus 2 tablespoons of balsamic vinegar and two tablespoons of soy sauce

Add the french fries to the stir fry, mix well and take off the fire.

Add salt, pepper and Aji to desired taste - mix well

Add the Parsley on top

Serve the Lomo Saltado with rice on the side.