Preheat oven to 375 degrees and grease a muffin tin with butter or oil.
Cook pasta according to instructions.
Mix the egg whites, salt, garlic salt, black pepper, ¼ cup of Parmesan, mozzarella and parsley together.
Cut pasta into smaller strips.
Add the pasta and toss well to coat.
Place pasta into muffin cups, pressing into the cups to fill until level. Top each pasta nest with a sprinkle of Parmesan cheese.
Bake for 14-16 minutes, or until pasta starts to brown slightly at the tips.
Remove from oven and pop nests out of the tins.
Immediately top with marinara dipped meatballs, an extra sprinkling of Parmesan, and serve hot.