Wash sweet pepper, cut in half, remove seeds and stalk, cut into strips. Peel one onion, cut into half rings. In a frying pan, heat 1 tbsp. l. vegetable oil, add prepared vegetables, sauté for 3 minutes, put on a plate, set aside.
Cut the tenderloin into thin sticks. Heat the remaining oil in a frying pan, add the meat, fry until tender, 5-7 minutes. Add browned vegetables and Fajita seasoning, mix, remove from heat. Keep warm until serving.
Wash tomatoes, cut, remove seeds, cut into cubes. Peel the remaining onion, cut into small cubes. Rinse lettuce leaves under running cold water, dry with a paper towel, disassemble into thin stems. Grate the cheese.
Lay fresh vegetables in a neat slide in a small plate, sprinkle with cheese, pour over Salsa sauce and sour cream.
Warm the wheat cakes quickly in a dry frying pan. Put warm meat with vegetables on hot cakes. Serve with salad.