1Place tortilla chips in 1-gallon resealable plastic food-storage bag; crush with rolling pin. Add Bisquick mix to chips; mix well.
2Between sheets of plastic wrap or waxed paper, flatten each chicken breast half to about 1/4-inch thickness. In small shallow dish, mix egg, taco sauce and salt. Dip chicken into egg mixture, then shake in bag to coat with Bisquick mixture.
3In 12-inch nonstick skillet, heat oil over medium heat. Reduce heat to medium-low. Cook chicken in oil 10 to 12 minutes, turning once, until juice is clear when center of thickest part is cut (170°F).