Wash the lemon hot and grate the peel thinly. Peel garlic and chop very finely. Mix both with 1 tablespoon of oil. Wash and quarter the tomatoes. Peel onion and chop finely.
Wash the meat, dab dry and cut into strips. Place 1-2 strips on each skewer in a wavy pattern. Season.
Heat 2 tablespoons of oil in a large coated frying pan. Fry the skewers for 3-4 minutes in portions. Take them out and brush them with the lemon-garlic oil. Keep warm.
Sauté onion in the frying fat. Add tomatoes and fry briefly. Deglaze with 3-4 tablespoons of water and simmer for 5-6 minutes. Wash basil and cut into fine strips. Add capers and basil to the tomatoes.
Season with salt, pepper and 1 pinch of sugar. Arrange the skewers with the tomato-capers sauce. Serve with baguette.