Preheat your oven to 400°F (200°C).
In a saucepan, heat olive oil over medium heat. Add flour and cook, stirring constantly, for about 2 minutes.
Gradually whisk in vegetable broth and milk. Cook until the mixture thickens, about 5 minutes.
Add tofu, mixed vegetables, salt, and pepper. Stir to combine.
Pour the mixture into a baking dish. Cover with the pie crust, sealing the edges.
Cut a few slits in the top of the crust to allow steam to escape.
Bake for 30-35 minutes, or until the crust is golden brown.
Let cool for a few minutes before serving.