There's Indian potato pie:
If it hasn't got a crust on top, it's not a pie.
Recipe
Ingredients
700g potato, sliced
400g sweet potato, sliced
1 onion, chopped
1 tbsp olive oil
1 tsp cumin seeds
2 garlic clove, crushed
1 red chilli, finely chopped
1 thumb-size piece ginger, grated
1 tsp each...