The most important step is drying the tomatoes—salt them and let them drain on paper towels, then pat dry before layering, or the crust will turn soggy. Fold caramelized onions or sauteed zucchini into the filling for extra richness. Short on time? A store-bought pie crust works well. For a tangy edge, mix a little goat cheese or feta into the cheddar. This pie is delicious warm or at room temperature and keeps in the fridge for up to 3 days; reheat gently in the oven to re-crisp the crust.