Make the marinade: In a large bowl, whisk together lime juice, cumin, smoked paprika, garlic, cayenne, chili powder, salt, pepper, olive oil, and red chili flakes.
3 medium chicken breasts, 1 tablespoon lime juice, 2 ½ teaspoon cumin, 3 teaspoon smoked paprika, 4 large garlic cloves, 2 teaspoon ground cayenne (spicy), ½ - 1 teaspoon chili powder, salt and pepper, 4 tablespoon olive oil, ½ teaspoon crushed red chili flakes