Guinness Beer Battered Onion Rings

Ingredients

• 1/4 teaspoon kosher salt
• 1 1/2 cups Guinness beer
• 1 1/2 quarts of canola oil
• 1/4 teaspoon cracked black pepper
• 1 cup all purpose flour
• 1 teaspoon Guinness
• 1/2 teaspoon garlic powder
• 2 teaspoons fresh rosemary
• 1 teaspoon paprika
• 2 tablespoons Dijon mustard
• 1/4 cup mayonnaise
• 2 large onions