Wash potatoes thoroughly and cook in boiling water for 15 - 20 minutes. Clean the rocket, wash, shake dry and cut into strips except for 3 leaves for garnishing. Wash lemon, grate dry and cut off peel with a pestle ripper. Peel garlic and press it through a garlic press. Mix all prepared ingredients and cover and chill. Peel onion and cut into large cubes.
Wash, clean and halve the tomatoes. Wash the meat, dab dry and cut into strips. Drain potatoes and cut in half or quarters depending on size. Heat 3 tablespoons of oil in a pan. Fry the potatoes for about 10 minutes while turning. Add onion for the last 3 minutes. Season with salt and pepper. Remove the potatoes and keep them warm. Heat 1 tablespoon of oil. Fry the meat for about 5 minutes, turning it over. Add the tomatoes 2 minutes before the end of the cooking time. Season with salt and pepper.
Season with salt and pepper. Remove the potatoes and keep them warm. Heat 1 tablespoon of oil. Fry the meat for about 5 minutes, turning it over. Add the tomatoes 2 minutes before the end of the cooking time. Season with salt and pepper. Mix potatoes, meat and Gremolata. Garnish with remaining rocket