1. Heat oil in large, nonstick skillet over medium-high heat. Add bell peppers, onion and garlic; cook, stirring occasionally, for 5 to 6 minutes or until onion is slightly golden and peppers are tender.
2. Stir in beef or chicken, cumin, chili powder and salt. Cook, stirring occasionally, for 7 to 8 minutes or until meat is no longer pink. Stir in salsa; heat through.
3. Serve in tortillas; top with sour cream, cilantro and a squeeze of lime juice.