Preheat the oven to 375°F (190°C).

In a bowl, mix the flour and salt together. Cut in the cold butter until the mixture resembles coarse crumbs.

Beat the eggs and add to the flour mixture, stirring until just combined. Form into a dough and chill for 30 minutes.

In a skillet, cook the ground beef and Italian sausage over medium heat until browned. Drain excess fat.

Add the spinach, ricotta, Parmesan, garlic powder, black pepper, and oregano to the meat mixture; stir to combine.

Roll out the dough and line a pie dish. Fill with the meat and cheese mixture.

Cover with additional dough, seal edges, and make slits on top for steam escape.

Bake for 50 minutes or until the crust is golden brown.