01 - Heat a large nonstick skillet over medium-high heat. Add ground turkey or chicken and cook, breaking up with a spoon, until browned, approximately 4 minutes.
02 - Add finely chopped red onion, minced garlic, diced red bell pepper, and minced jalapeño if using. Sauté until softened, about 3 minutes.
03 - Stir in smoked paprika, ground cumin, chili powder, dried oregano, salt, and black pepper. Cook for 1 minute until fragrant.
04 - Mix in tomato paste and cook for 1 minute, stirring constantly.
05 - Add drained black beans and low-sodium chicken broth or water. Simmer for 5 to 6 minutes until slightly thickened.
06 - Remove skillet from heat and stir in fresh lime juice.
07 - Heat tortillas in a dry skillet or microwave until warm and pliable.
08 - Fill each warmed tortilla with the protein mixture. Top with shredded lettuce, quartered cherry tomatoes, nonfat Greek yogurt or sour cream, fresh cilantro leaves, and shredded reduced-fat cheese if desired. Serve immediately.