Preheat oven to 425 F. Line a baking sheet with parchment paper and set aside.
Roll the cold pie dough into a circle on the counter until it's about 12" wide. It doesn't have to be perfect and pretty, just flat!
Transfer the pie dough onto the baking sheet. I find it's easiest to do this by wrapping the dough around the rolling pin and then unravelling it on the baking sheet.
Spread the soft cheese onto the pie dough, leaving a 2" space around the edges.
Dollop 2 tbsp of pesto on top.
Top the cheese with the tomatoes and zucchini slices, overlapping them slightly as needed.
Dollop the ricotta and remaining pesto on top of the veggies.
Gently fold the edges of the pie crust on top of the tomatoes and zucchini so it covers them slightly, and brush the pie crust with the egg wash.
Sprinkle the shredded white cheddar cheese on top of the crust.
Bake for 25-30 minutes until the edges are brown, and the filling is bubbling.
Remove from the oven and serve with a drizzle of olive oil, a sprinkling of herbs, and a few pinches of salt, pepper, and red pepper flakes.