Cook the spaghetti in salted water for about 8 minutes. Then drain. Peel and finely chop the onions and garlic. Carve tomatoes crosswise, blanch and peel the skin.
Quarter the tomatoes, remove the seeds and cut into cubes. Wash and chop the basil, except for something to garnish. Heat the oil. Sauté onions and garlic until translucent. Add the tomatoes and basil and fry briefly.
Add the noodles and toss. Season vinegar with salt, pepper and sugar. Mix spaghetti and marinade and let it stand for a while. Wash the meat and dab dry. Stick 1 slice of bacon and 2 sage leaves on each.
Fry in hot fat for 1-2 minutes on each side. Season with salt and pepper. Arrange lukewarm salad and schnitzel. Garnish with lemon and basil.