Preheat the oven to 375°F (190°C).
Combine whole wheat flour and salt in a mixing bowl.
Add cold butter and mix until crumbly, resembling coarse crumbs.
Gradually add cold water until the dough comes together nicely.
Press this mixture into a pie dish, pricking the bottom with a fork.
Pre-bake the crust for 10 minutes, then remove from the oven.
Whisk together cottage cheese and eggs in a large bowl until well combined.
Stir in spinach, bell pepper, onion, shredded cheese, black pepper, and garlic powder.
Pour the filling into the pre-baked crust, spreading it evenly.
Bake in the preheated oven for 25 minutes or until the filling is set and lightly golden on top.
Let cool for a few minutes before slicing and serving.