Peel the sweet potatoes, wash them thoroughly and cut them into vegetable spaghetti with a spiral slicer. Place on a flat board and freeze for about 30 minutes. Peel and finely chop the onions. Heat 1 tablespoon of oil in a frying pan, sauté the onions for about 1 minute, remove from the pan and allow to cool.
Wash parsley, shake dry, pluck leaves from the stems and chop finely.
Knead minced meat, onions, tomato paste, parsley and breadcrumbs, season with salt and pepper. Form into 4 meatballs of the same size. Heat 4 tablespoons of oil in a large pan and fry the meatballs for about 7 minutes, turning them over.
Cut the avocados in half, remove the seeds and peel the flesh. Crush the flesh finely with a fork. Wash the tomatoes and cut them into large pieces. Peel garlic and press it through a garlic press.
Stir tomato pieces and garlic into the avocadomus. Season to taste with lime juice and salt.
Heat the remaining oil in a large pan to approx. 160° C. Fry the sweet potatoes in it in portions for 2-3 minutes, take them out and let them drip off on kitchen paper. Peel red onions and cut them into fine rings.
Wash the salad and shake dry. Arrange the meatballs on salad leaves, layer the onions, guacamole and sweet potato spirals on top.