For the dough:3 cups all-purpose fl

For the dough:
3 cups all-purpose flour
2 tablespoons sugar
¼ teaspoon salt
1 cup (2 sticks) unsalted butter, cold, cut into cubes
2 eggs, whisked
2-3 tablespoons milk

For the filling:
1⅓ cups hulled and chopped fresh strawberries
1 cup diced rhubarb
2 tablespoons cornstarch
½ cup granulated sugar
pinch of salt
1 teaspoon orange zest

For the egg wash:
1 egg, whisked with 1 teaspoon water
sugar for sprinkling