In a large skillet, heat the olive oil over medium heat. Add the diced onion, and cook for 4 to 6 minutes, or until it begins to soften. Add the turkey, and break it up with a spatula or spoon, cooking until it begins to brown, about 3 to 5 minutes.
Add the tomato paste, and stir to evenly distribute.
Add the chili powder, cumin, oregano, paprika, garlic powder, and salsa, cooking for 3 to 4 more minutes until fully cooked. Set aside.
Divide the lettuce among bowls. Top with beans, cherry tomatoes, cilantro, jalapeños, red onion, bell pepper, avocado and lime. Add a dollop of salsa, if desired.