These grilled chicken tacos are loaded with flavor and topped with a creamy avocado crema. To make the marinade, combine lime juice, garlic, cumin, chili powder, salt, and olive oil in a food processor. Pulse until smooth, then pour over the chicken and let it marinate for at least 30 minutes. Grill the chicken until cooked through, then slice into strips. To make the avocado crema, blend avocado, sour cream, lime juice, and salt in a food processor until smooth. Serve the chicken on warm tortillas with the avocado crema, diced tomatoes, and shredded lettuce.
