Wash the potatoes and cut into long slices. Spread on a baking tray sprinkled with coarse salt. Cook in the preheated oven (electric cooker: 225 °C/ gas: level 4) for about 15 minutes.
Meanwhile wash the turkey breast, dab dry and cut into cubes of about 3 cm. Cut bacon into slightly thicker slices. Clean, wash and cut the bell peppers and zucchini into pieces. Peel and halve onions.
Put them alternately on skewers with small twigs of rosemary in between. Halve the garlic. Heat the oil. Sauté garlic and pepperoni briefly in it, take aside. Fry skewers in cooking fat for 5-7 minutes, turning.
Season with salt and pepper. Serve potatoes, skewers and sour cream garnished with fresh herbs.