Boil potatoes, then transfer to a 20cm greased baking tin and crush. Press firmly, creating the sides. Drizzle with olive oil, sprinkle with salt, and bake at 200C (fan) for 40-45 min.
Add mozzarella, tomatoes, shallots, and spinach.
Whisk eggs, cream cheese, salt, pepper, nutmeg, garlic powder, and milk. Pour over the potato base.
Bake for 30-35 min until settled.
Sprinkle Parmesan, garnish with basil.
