Step 1

Preheat oven to 400 degrees. Coat a large baking sheet with foil and then spray with GF non-stick cooking spray.

Step 2

In a large baggie, combine GF flour, garlic powder, mustard, and salt. Add onions and toss to coat.

Step 3

Pour buttermilk into a large bowl, add onions and toss to coat.

Step 4

Add onions back to baggie, add the bread crumbs, and toss to coat.

Step 5

Transfer onions to baking sheet. Bake until golden brown, 35 minutes. Serve hot.