Step-by-Step Instructions:
Soak the onion rings in buttermilk for at least an hour.
- In a bowl, mix flour, paprika, salt, and pepper.
- Heat oil in a deep fryer or large pot to 375°F (190°C).
- Dredge the soaked onion rings in the flour mixture.
- Fry the onion rings in batches until they are golden brown and crispy.
- For the spicy aioli, mix mayonnaise, sriracha, minced garlic, and lemon juice in a small bowl.
- Serve the onion rings hot with the spicy aioli on the side.