Knead the ingredients for the dough together and chill for about 30 minutes.
Coarsely grate the zucchini. Roast the pine nuts in a pan until golden, then add the oil and fry the zucchini for a few minutes. Season with salt, pepper and chopped mint, remove from heat and let cool down a little. Whisk eggs, cream and sour cream and also season with salt and pepper. Add the egg mixture to the zucchini.
Roll out the dough and place in a greased 28-inch springform pan, forming an approx. 3 cm high rim. Pour in the zucchini and egg mixture. Cut the goat cheese into slices and spread over the zucchini mixture.
Bake at 180 ° (preheated) for approx. 30 minutes, until the mixture is firm and the surface is golden yellow.