Onion rings: In a medium mixing bowl, whisk flour and buttermilk together until smooth. Whisk in Worcestershire sauce, garlic, paprika, salt and pepper. Taste the batter to make sure you have enough salt.
Slice onion into thick rings or wedges. Pat them dry with a paper towel, to soak up the onion juice.
Preheat oil in a sauce pot (or in a fryer) on medium-high heat. (Do not use a shallow pot so that you minimize the splatter.)
Dip each onion ring into batter and slowly add them to the hot oil. Repeat with as many onion rings as your pot will hold. Fry them until they are golden brown. (This may take 7-10 minutes but watch them. Don't be tempted to raise the heat to high or you will end up with raw onion in crispy batter.)
Lay cooked onion rings onto a paper towel to soak up excess oil.
Burgers: Combine ingredients for the burger in a medium mixing bowl and mix very well, until all ingredients are incorporated throughout.
Preheat skillet over medium heat and add a little bit of vegetable oil. Form two burger patties and cook on both sides util burgers reach desired temperature.
Build your burgers with bbq sauce, sliced pickles, cheese and onion rings on top.