Try this Torta Salata con Melanzane recipe.
Replacing puff pastry with a traditional shortcrust pastry yields a sturdier, crumbly base that absorbs less oil from the fried or roasted nightshades, shifting the texture from flaky-rich to densely crumbly. Raw eggplants contain bitter, sponge-like cellular structures filled with water; salting them ahead of time draws out that excess moisture via osmosis. Eliminating this step guarantees that the trapped water releases during baking, rendering the surrounding pastry soggy and preventing the crust from crisping against the heat of the pan.
Tomatoes and fresh mozzarella introduce significant water hazards into enclosed pastry shells. Quartering the Piccadilly tomatoes and draining them on a colander removes free liquid that would otherwise boil inside the crust. Similarly, tearing the bocconcini mozzarella into smaller pieces and pressing them aggressively with paper towels prevents pooling pockets of whey during the bake. When bound with a single whole egg and grated cheese, the filling coagulates into a cohesive custard rather than breaking apart into separate watery components. Bake this tart on the lowest oven rack at 200 degrees Celsius for approximately 40 minutes, relying on conductive heat from the bottom element to fully set the pastry base before the edges over-brown. Allowing the tart to rest for 15 minutes post-bake enables the internal starches and egg proteins to firm up, making clean slices possible without structural collapse.