Chicken with Provençal Sauce

4 (6-ounce) skinless, boneless chicken breast halves
1/4 teaspoon salt
1/4 teaspoon freshly ground black pepper
1 1/2 tablespoons olive oil
1 garlic clove, minced
1 cup fat-free, less-sodium chicken broth
1 1/2 teaspoons dried herbes de Provence
1 teaspoon butter
1 teaspoon fresh lemon juice
Fresh thyme sprigs (optional)

Place each chicken breast half between 2 sheets of heavy-duty plastic wrap;
pound to 1/2-inch thickness using a meat mallet or rolling pin. Sprinkle chicken evenly with salt and pepper.
Heat oil in a large nonstick skillet over medium heat.
Add chicken; cook 6 minutes on each side or until done.
Remove chicken from pan; keep warm.
Add garlic to pan; cook 1 minute, stirring constantly.
Add broth and herbes de Provence; bring to a boil, scraping pan to loosen browned bits.
Cook until broth mixture is reduced to 1/2 cup (about 3 minutes).
Remove from heat; add butter and lemon juice, stirring until butter melts.
Pour sauce over chicken.
Garnish with thyme sprigs, if desired.