Rinse the turkey breast (chicken is also possible, of course) with cold water, pat dry and cut into small pieces. Chop the onion and garlic, dice the paprika and slice the mushrooms.
Melt the butter in a pan and sauté the onion and garlic, add the meat and fry briefly on each side. Now add the peppers and mushrooms and fry for about 4-5 minutes. Deglaze with stock and cream and simmer. Stir in the crème fraîche and season with salt and pepper, simmer for approx. 5-8 minutes. The peppers should still be firm to the bite, then it will taste even better.
Cook rice as usual, if you like, you can refine it with a little butter.