Wash potatoes thoroughly and boil in water for about 20 minutes. Clean, wash and cut the beans into pieces. Cook in boiling salted water for about 12 minutes. Drain both and let them cool down.
For the dressing, peel and finely chop the garlic. Wash the herbs, shake dry and pluck. Cut basil and mint finely to half. Mix yoghurt with garlic, chopped herbs, 2 tsp. mustard, oil, honey, lemon peel and juice. Season to taste with salt and pepper.
For the salad, wash the tomatoes, cut them in half. Clean and wash spring onions, cut into rings. Cut the potatoes into pieces. Mix everything with beans and dressing. Leave to stand for at least 30 minutes.
For the meatballs, soak rolls in water. Cut feta into 8 pieces. Peel onion and chop finely. Minced meat, onion, 2 tsp. mustard, squeezed out roll, egg, 1 1⁄2 Knead salt and pepper. Form 8 meatballs from the mixture, putting 1 piece of feta in the middle of each.
Heat clarified butter in a frying pan. Fry the meatballs for about 4 minutes on each side. Season salad to taste and fold in the remaining herbs. Serve with meatballs.