Clean, wash and drain the tomatoes, peppers and celery. Put some celery green aside for garnishing. Dice the tomatoes and peppers, cut the celery into thin slices. Peel onion and garlic.
Finely dice onion, press garlic through a garlic press. Wash the thyme, dab dry and scrape the leaves off the stalks. Heat the oil in a pot and fry the onions in it until transparent.
Add tomatoes, celery, paprika, garlic and 2/3 of the thyme and steam for about 5 minutes. Season with salt and pepper, fold in the pasta and fill into a greased clay or casserole dish. Pour on the stock (the ingredients must be covered with liquid) and cook in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 1 hour.
In the meantime, finely dice the ham and crumble the feta. 5 minutes before the end of the cooking time, fold the ham into the vegetable noodles and bake until done. Sprinkle the finished pasta with feta cheese and the remaining thyme.
Serve garnished with celery green.