Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Slice the sweet potato into 1/2-inch thick rounds and slice the bell pepper into thin strips.
Toss the sweet potato rounds and pepper strips with half of the olive oil and a pinch of sea salt, then roast for 20 minutes until tender and slightly browned.
While vegetables roast, combine the ground chicken, minced garlic, dried oregano, chopped parsley, sea salt, and black pepper in a mixing bowl.
Form the chicken mixture into two even patties, ensuring they are roughly the same diameter as your sweet potato rounds.
Heat the remaining olive oil in a non-stick skillet over medium heat and cook the patties for 5-6 minutes per side until the internal temperature reaches 165°F.
To assemble, place the chicken burgers on top of the roasted sweet potato rounds and pile the roasted peppers and fresh baby spinach on top.