Chicken kebab has never been so EASY and so DELICIOUS 😋 you will be satisfied with the taste 🌟

3 chicken breasts.
Salt to taste.
Black pepper.
1 teaspoon spice mix.
1 teaspoon paprika.
1 tablespoon mustard.
2 cloves of garlic.
200 ml kefir.
Sweet peppers.
1 onion.
2 potatoes.