Crispy Fried Onions

Bahan-bahan (4 porsi)

• 1 pound yellow onions (or white, sliced into ⅛ inch rings)
• 1 cup buttermilk
• 2 cups all-purpose flour
• 1 teaspoon salt (plus more for serving)
• ½ teaspoon black pepper
• vegetable oil (for frying )