Wash the tomatoes, quarter them and remove the seeds. Peel the onion and garlic. Finely dice everything. Wash the basil and chop the leaves. Mix the prepared ingredients with 2 tablespoons of oil, vinegar, salt and pepper. Pat the meat dry and fry in 2 tablespoons of hot oil, turning occasionally, for about 10 minutes. Season with salt, pepper and oregano. Spread the tomato mix on top and sprinkle with toasted pine nuts.