Step 1Season chicken with salt and pepper to taste and set aside.
Step 2Heat 1/2 inch oil in large nonstick skillet over medium-high heat. Add chicken and fry, turning once, until chicken is browned and completely cooked, about 5 minutes a side. Remove chicken from skillet and keep warm.
Step 3Remove all but 3 tablespoons oil from skillet, reduce heat to medium and add onion and garlic. Cook, stirring, until onion just begins to soften, about 2 minutes. Pour onion, garlic and oil from skillet over chicken. Pour lemon juice over chicken and serve.