1. Prepare coating station: Place a half cup potato starch in one shallow dish, a quarter cup potato starch, ground almonds, and salt in another, and combine eggs, grated onion, and garlic in a third.
2. Coat the bottom of a baking sheet with a thin layer of oil.
3. Dredge chicken first in potato starch, then egg mixture, and then ground almond mixture.
4. Place chicken breasts on baking sheet and bake for 10 minutes per side. Remove from oven and serve.