1Mix all flours, water, olive oil, and salt in a bowl. Add curry or paprika and mustard for flavor and knead the dough until smooth.
2Place the dough in a container and refrigerate.
3Roughly chop onions, leeks, garlic, and cut oyster mushrooms into cubes. Combine in a bowl with salt, pepper, and olive oil.
4Spread vegetables on a baking sheet and bake at 200°C.
5Prepare the filling mixture by whisking together the maizena, milk, eggs, salt, and pepper.
6Roll out the refrigerated dough to the size of your mold, line the mold with it, trim edges, and prick the base with a fork.
7Pre-bake the dough in the oven.
8Spread the roasted vegetables over the pre-baked dough base, top with grated cheese and corn kernels if desired, then pour the egg and milk mixture over it.