Combine first 3 ingredients in a small baking dish. Sprinkle chicken with salt; dredge chicken in flour mixture.
Heat oil in a large nonstick skillet over medium-high heat. Add chicken to pan; cook 4 minutes on each side or until lightly browned. Transfer chicken to an 11 x 7-inch baking dish coated with cooking spray. Add onion to skillet; cook 3 minutes. Add garlic to pan, and sauté 1 minute.
Combine fruit, juice, and tequila in a microwave-safe dish, and microwave at high 2 minutes. Pour fruit mixture into pan; bring to a boil, scraping pan to loosen browned bits. Cook 1 minute. Pour onion mixture over chicken; top with lime slices. Bake at 400° for 20 minutes or until chicken is done.