Salt the shredded zucchini and let it sit for 10-15 minutes, then squeeze out excess moisture with a clean kitchen towel—this prevents a soggy crust and ensures it holds together properly when baked.

Bake the zucchini crust alone at 400°F for 12-15 minutes before adding the filling to ensure it becomes pliable and structurally sound, preventing a wet, mushy bottom.

Slightly warm your milk and eggs before mixing them together—this promotes even cooking and prevents the custard from curdling or creating rubbery pockets in the finished quiche.

Layer heavier ingredients like bacon and onions on the crust first, then add spinach and tomato, finishing with the egg custard—this ensures even distribution and prevents toppings from floating to the surface.

Insert a knife near the center; it should come out clean with just a tiny bit of custard clinging to it—this indicates perfect doneness without overcooking, which can cause the delicate zucchini crust to become tough.