Rinse chicken; pat dry with paper towels. Combine coriander, salt, and pepper. Rub spice mixture onto chicken on both sides. Spray a cold large skillet with nonstick spray. Preheat skillet over medium heat. Cook chicken in hot skillet for 8-10 minutes or till tender and no longer pink, turning once. Remove chicken from skillet; keep chicken warm.
For sauce, combine lime juice, cornstarch, and sugar; set aside. Carefully add chicken broth and orange juice to hot skillet. Stir in lime juice mixture. Cook and stir till thickened and bubbly. Cook for 1 minute more. Stir in cilantro and tequila. Spoon sauce over chicken. Garnish with lime slices and cilantro leaves, if desired.