Heat the oven to 375°F. Lightly grease 4 cups of a standard muffin pan.
Add the ground turkey, spinach, feta, egg, almond flour, onion, garlic powder, oregano, salt, and pepper to a mixing bowl. Gently mix until combined, taking care not to compact the turkey mixture.
Divide the mixture evenly among the 4 prepared muffin cups. Shape each portion into a rounded mound.
Cut each bacon slice in half crosswise. Wrap two pieces around each turkey mound, overlapping the ends slightly on top. Tuck the ends into the sides of the meat mixture so the bacon stays in place.
Bake until the turkey is cooked through and the bacon is browned, about 25 to 30 minutes. Let the muffins rest in the pan for 5 minutes, then lift them out carefully and serve warm.