Combine 2 teaspoons garlic, oil, 1/4 teaspoon salt, thyme, 1/4 teaspoon black pepper, and potatoes on a jelly roll pan coated with cooking spray. Bake at 400° for 30 minutes or until tender.
Heat a large Dutch oven coated with cooking spray over medium-high heat. Sprinkle chicken with 1/2 teaspoon salt and 1/4 teaspoon black pepper. Add half of chicken to pan; sauté 5 minutes or until browned. Remove chicken from pan. Repeat procedure with remaining chicken; remove from pan.
Add onion to pan; sauté 5 minutes. Stir in wine, scraping pan to loosen browned bits. Bring wine to a boil; cook until reduced to 1/3 cup (about 2 minutes). Add potatoes, chicken, broth, pepperoncini, and olives; cook 3 minutes, stirring occasionally. Stir in 2 teaspoons garlic, 1/4 teaspoon salt, tomato, basil, and artichokes; cook 3 minutes or until thoroughly heated. Sprinkle with cheese. Garnish with thyme sprigs, if desired.