Preheat the oven to 400°F.

Cook the macaroni in salted water according to package instructions. Drain and set aside.

In a large bowl, whisk together eggs, milk, salt, pepper, garlic powder, chili powder, and paprika.

Add the cooked macaroni to the egg mixture and stir to combine.

Pour the mixture into a greased baking dish and top with crumbled feta cheese.

In a small skillet, melt the remaining butter and add the panko crumbs. Cook until golden brown.

Sprinkle the toasted crumbs and grated parmesan over the casserole.

Bake in the preheated oven for 35 minutes until the top is golden and the casserole is set.

Garnish with chopped parsley and serve hot.