Beef (I have a tenderloin) wrapped in plastic wrap, chop it well and cut into strips about 0.5 cm wide.

Half onion cut into thin half-rings.

Prepare the vegetables on the side. I have this, but, of course, is what he loves. Potatoes for mashed potatoes peeled, cut into medium-sized pieces and then boil it.

Fry the onions until soft in vegetable oil, then add the sour cream and tomato paste, stir, reduce the heat and stirring constantly cook for 2-3 minutes. Add a little water, salt, pepper, and a very small fire and cook until tender (stirring constantly). At this time, the second a well-heated pan fry the meat in vegetable oil (about five minutes), season with salt and pepper.

Chopped vegetables put in the steamer and put on the fire. Add meat to the sauce and boil for another 3-4 minutes. Turn off the heat, leave the lid "brew" for about 10 minutes. At this time, turn off the heat under the potatoes and cook mashed potatoes. The vegetables in the steamer should be ready, it usually takes only a few minutes.

You're done! Bon appetite!:)