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I'm traditional. Lettuce, tomato, pickles, cheddar cheese, and some condiments. Nothing exciting here.

A tribute the the great and thrice greasy Roy Rogers Double R Bar Burger. Thinly sliced ham and aged cheddar topped with and sauce of dijon mustard, honey and mayonnaise.

Cheese

grilled onions, lettuce, and black pepper kettle chips.

I can be all over the board, depending upon what type of burger I am building, but the one constant is some variety of cheese.

A not to sweet hickory sauce and a fried onion! I'm salivating just thinking of it.

avocado

blue cheese and carmelized onions!

Cheese is a must and lots of it. American, cheddar, gruyere, monterey jack. Ketchup, mustard, tomato, lettuce and raw onions. That's my ideal burger with the toppings that makes the burger.

LOTS of pickles, goat cheese, caramelized onions, chipotle sauce, pesto, cheese, tomatoes, onions (doesn't matter which kind), ketchup, and mustard is essencial.

My two favorite toppings are beets (yes, beets) and ketchup- altho not on the same burger.

That is a Beautiful Hamburger, the Pesto burger!
I am more of a basic burger kind or guy, but that is appealing!