Cook the sun-dried tomatoes in vinegar water for two to three minutes until they are soft and also put them in the food processor. Add the garlic cloves, salt, pepper, peperoncini (amount as desired and depending on the degree of spiciness), the pine nuts and the oil. Crush everything into a homogeneous mass.
Mix the created pesto with the pasta and put it in a baking dish. Crumble the feta cheese and mix in. Cut the tomatoes into slices and place them on top of the pasta. Grate the parmesan and sprinkle on the tomatoes.
Bake everything at 200 degrees for about 15 minutes until the cheese is crispy.