Wash the meat, dab dry and cut into large cubes. Spread on four oiled wooden skewers. Heat 2 tablespoons of oil in a frying pan. Fry the skewers all around for about 10 minutes.
In the meantime clean, wash and roughly dice the peppers. Clean the mushrooms, wash and halve them if necessary. Peel onions and cut into slices.
Season skewers with salt, pepper and paprika powder. Remove and keep warm. Fry the peppers, mushrooms and onions in hot frying fat. Stir in tomato paste, sweat briefly. Deglaze with 200 ml water.
Bring to the boil and simmer for 4-5 minutes. Stir in crème fraiche. Season to taste with salt, pepper and paprika. Arrange the vegetables with the skewers.