In a medium mixing bowl, combine the ground turkey, mashed sweet potato, rinsed black beans, and egg.
Season the mixture with sea salt, black pepper, garlic powder, and smoked paprika, then mix thoroughly by hand.
Shape the mixture into two uniform, thick patties.
Heat the olive oil in a non-stick skillet over medium-high heat.
Place the patties in the skillet and sear for 5 to 6 minutes per side until the exterior is golden brown and the center is cooked through.
Place the fresh baby spinach into a wide serving bowl as the base.
Arrange the cooked burger patties on top of the greens.
Garnish with the sliced avocado and a dollop of Greek yogurt before serving.