In a large mixing bowl, combine the ground chicken, chopped green onions, diced bell pepper, cilantro, minced garlic, kosher salt, red pepper flakes, and lime juice.

Divide the mixture into four equal portions and shape into patties, creating a small indentation in the center.

Preheat a large skillet over medium-high heat. Add the olive oil and heat until shimmering.

Place the patties into the hot skillet, cooking for 2.5 to 3 minutes on each side until golden brown.

In a large bowl, toss the mixed greens with olive oil, lime juice, and a pinch of salt.

Place each burger on a bed of mixed greens, topping with avocado slices and fresh tomato.