For the chilli sauce, mix mayonnaise, crème fraîche and chilli sauce
For the potato mix, peel, wash and slice the potatoes. Heat 2 tablespoons of oil in a large frying pan. Fry the potatoes for 20-30 minutes while turning. Season with salt, pepper and Cajun spice and keep warm
For the meatballs, knead the mince, egg and breadcrumbs. Season with salt and pepper. Form 4 flat meatballs from the mixture. Heat 2 tablespoons of oil in a frying pan. Fry the meatballs for 3-4 minutes on each side
Wash the lettuce leaves and shake dry. Cut open the buns. Spread ketchup and some chilli sauce on the lower halves. Put the meatballs on top. Cover with lettuce leaves and drizzle some garlic sauce over them. Place the upper half of the rolls on top. Mix the potatoes with potato chips and Pimientos de Padrón. Add the rest of the chilli sauce and garlic sauce