Combine the lime juice and zest, garlic, sugar, oregano, cinnamon, cumin, salt, pepper cayenne, paprika and 2 tablespoons oil in a large bowl. Add the chicken to the marinade and turn to coat. Cover the bowl with plastic wrap and refrigerate for at least 1 hour or up to overnight.
Heat the remaining tablespoon oil in a large skillet over medium-high heat. Remove the chicken from the marinade, letting the excess drip off, and add to the skillet. Cook, tossing occasionally, until the chicken starts to brown, 5 to 6 minutes. Add the bell peppers and onion and cook for until the vegetables are tender, 3 to 4 minutes more. Divide the chicken, peppers and onion equally among the eight tortillas. Garnish with the cilantro, sour cream and hot sauce, if using.
Instead of using tortillas for the tacos, try wrapping the chicken, peppers and onion in large Boston lettuce leaves.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.