Peel the tomatoes (put them in hot water and remove the skin), then remove the inside and cut the rest into small cubes.
Remove the stem of the mushrooms, crumble the feta cheese into small pieces and use a fork to mix with the cheeky feta cheese and the tomato pieces to form a paste. Fill the mushrooms with the feta paste.
Preheat the grill, place the mushrooms in an indirect grill area and grill at approx. 180 - 200 ° C for 20 - 25 minutes. Remove from the grill and serve.