Peel and halve the onion and cut into strips. Heat oil and fry meat in portions. Sauté onion in hot frying fat, add tomato paste and sauté. Add meat and season with salt and pepper.
Pour on 300 ml water, cover and stew for about 45 minutes. In the meantime clean and wash the peppers and leek. Cut paprika into strips, leek into rings. Cook for the last 10 minutes of cooking time.
Cook the pasta in boiling salted water for about 10 minutes, drain. Wash the chives, dab dry and cut into fine rings. Thicken goulash with sauce thickener, season with paprika, salt and pepper.
Sprinkle with chives and serve with the noodles.