Wash the potatoes and cook in boiling water for about 20 minutes. In the meantime wash, clean and halve the beans. Cook the beans in boiling salted water for about 8 minutes. Take them out and remove
Peel and finely dice 1 onion. Heat 3 tablespoons of oil in a pot and sauté the onion in it. Deglaze with vinegar and stock. Drain the potatoes, rinse and peel the skin. Cut potatoes into 3-5 mm thick slices.
Wash and clean the tomatoes and cut them into medium sized pieces. Pour vinaigrette over the potatoes and mix with beans and tomatoes. Season with salt and pepper and let it stand for about 30 minutes. In the meantime, wash the pork fillets, dab dry and cut into about 16 medallions.
Wrap 1 medallion with 1 slice of bacon around each. Wash and clean the peppers and cut them into medium-sized pieces. Peel the remaining onion and cut into slices. Wash lemon hot, dab dry and cut into about 4 medium sized pieces.
Put 4 medallions each with pieces of paprika and onion alternately with 1 piece of lemon on 1 skewer. Heat the rest of the oil in a pan and fry the skewers for about 10 minutes, turning them over. In the meantime, stir mustard and sour cream until smooth.
Season to taste with salt and pepper. Remove the skewer and season with salt and pepper. Arrange on a plate with the bean and potato salad and garnish with oregano. Serve dressing separately.