Prepare the quinoa according to package instructions if not already cooked, then set aside.
Heat the olive oil in a large skillet over medium-high heat.
Add the ground turkey to the skillet, breaking it apart with a spatula, and season with sea salt, black pepper, chili powder, garlic powder, and cumin.
Cook the turkey until it is mostly browned, then add the chopped mixed bell peppers to the skillet.
Sauté the turkey and peppers together for another 5 minutes until the turkey is fully cooked and the peppers are tender-crisp.
In a large bowl, layer the mixed lettuce and the cooked quinoa.
Top the quinoa with the sautéed turkey and pepper mixture, the rinsed black beans, and the diced tomato.
Drizzle the lime juice over the entire bowl before serving.