Line baking tray with baking paper. Spread the Parmesan cheese in two heaps (approx. 4 cm Ø) on the baking paper. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 5-8 minutes until golden brown.
Let it cool down. Wash and clean the tomatoes. Grate the tomatoes coarsely on the coarse grater, except for the skin residue. Collect the pulp and juice. Peel and finely chop the onion. Wash thyme, dab dry, put aside some for garnishing, chop the rest finely.
Cook the pasta in boiling salted water according to the instructions on the packet. Wash the meat, dab dry. Season with salt and pepper. Heat oil in a coated pan. Fry meat on each side for about 4 minutes.
Remove and keep warm. Sauté onion in hot frying fat. Add thyme and tomatoes and simmer for 5 minutes. Stir in lemon zest, except for a little bit for garnishing, and season to taste with salt and pepper.
Drain the pasta and let it drain. Cut the meat into slices. Arrange noodles with sauce and meat. Garnish with lemon peel and thyme.