Preheat the oven to 425 degrees F.
Leave the pie crust at room temperature for about 20 minutes.
Line two rimmed baking sheets with parchment paper.
Rinse the zucchini and cut into thin rounds. Spread the rounds out on one of the baking sheets.
Halve the tomatoes and spread them out evenly on the other baking sheet.
Lightly salt the zucchini and the tomatoes and place in the preheated oven until soft, about 12 minutes.
Let the vegetables cool until you can easily handle them.
Mix the ricotta and one large egg together in a small bowl. Set aside.
Place the pie crust on a sheet of parchment paper. Roll it out to about 11 inches (they are generally 9 inches).
If there is any liquid on the surface of the zucchini, pat them dry with paper towels.
Move the dough, with the parchment paper, onto one of the rimmed baking sheets.
Spread the ricotta mixture over the dough leaving about a two inch border.
Lay the zucchini slices over the ricotta filling letting the slices overlap somewhat.
Scatter the tomato halves over the zucchini.
Sprinkle the veggies with 3/4 tsp herbes de Provence.
Lightly salt and pepper.
Drizzle about 1 tbsp olive oil over the vegetables.
Sprinkle the vegetables with about 3/4 of the Parmesan cheese, reserving a bit for the crust.
Fold up the edges of the pie crust, overlapping pieces and pressing them down as you go.
Beat together the second large egg and 1 tbsp water.
Brush the egg wash over the crust. You can also tuck a little bit between the folds to serve as a sort of glue.
Sprinkle the remaining 1/4 tsp herbes de Provence and the rest of the Parmesan cheese over the prepared crust.
Bake until the crust is golden brown, the vegetables tender, and the ricotta filling is set, about 25-30 minutes.
Allow to cool for about 10 minutes before cutting.