In a large bowl, mix all ingredients together using gloved hands until just barely mixed. Refrigerate the mixture for 20 minutes. After 20 minutes, remove the mixture from the fridge and form 6 burger patties, placing them on a plate to rest.
Heat a large non stick skillet over medium heat. When hot, add oil. Add the burgers to the skillet and let them cook for 4-6 minutes until golden brown. Flip and cook for another 4-5 minutes until golden brown. Serve immediately on a toasted bun with avocado slices, spicy mayo, lettuce and tomato.