Fry the chopped onion in butter, add peanut butter, buckwheat flour, dijon mustard, pour in the milk and mix everything well. Boil until a sauce is creamy.
Slice the chicken breast, season with salt, pepper, curry powder, favorite seasoning, sweet bell pepper powder. Chopped carrots and broccoli put in a steaming pot, season with salt and pepper, add chicken slices and steam for 15 minutes. Serve with sauce.