Preheat a non-stick skillet over medium heat.
Form the lean ground turkey into a 6-ounce patty. Season lightly with salt and pepper if desired.
Place the turkey patty in the skillet and cook for about 5-6 minutes per side, or until fully cooked through.
In a separate pan, heat 1 teaspoon of olive oil over medium heat. Add the sliced half onion and sauté on low-medium heat, stirring occasionally, until the onions become soft and caramelized, about 8-10 minutes.
Meanwhile, cook the turkey bacon in a non-stick skillet until crispy, about 3-4 minutes per side.
Lightly toast the whole wheat burger bun on the skillet or under a broiler for extra texture.
Assemble the burger by placing the cooked turkey patty on the bun, topping it with the crispy turkey bacon, a generous spoonful of caramelized onions, and adding fresh romaine lettuce and tomato slices.
Serve immediately and enjoy your balanced, flavorful meal.