In a mixing bowl, combine ground chicken, egg, breadcrumbs, red bell pepper, green onion, smoked paprika, Cajun seasoning, sea salt, black pepper, and garlic. Mix well.
Divide the mixture into four equal parts, roll each into a ball.
Heat avocado oil in a skillet over medium heat. Place the balls in the skillet and smash them into patties using a spatula. Cook for 4-5 minutes on one side, then flip.
Place a slice of cheddar cheese on each patty, cover the skillet with a lid, and cook for another 3-4 minutes until cheese melts.
While the patties are cooking, prepare the buns by spreading mayo and sriracha sauce on each half. Place a patty on the bottom bun, add red onion and two pieces of bacon, then cover with the top bun.
Serve hot and enjoy!