Sprinkle chicken thighs with a little salt and pepper. In a large nonstick pan, add chicken and cook about 5 minutes or until brown, turning once. Remove chicken from pan to a plate. Place mushrooms, onions, and both peppers in a large microwave-safe bowl. Cook in microwave for about 2-3 minutes until the vegetables are softened.
In the same large pan, heat 1 tablespoon olive oil. Add garlic, softened mushrooms, onions, and peppers. Saute on high heat until lightly browned and soft, about 3-4 minutes.
Stir in wine and cook for about 1-2 minutes until wine is almost evaporated.
Return chicken to pan and add the tomato sauce, Italian seasonings and fresh ground pepper. Bring to a boil, reduce heat, and cook uncovered for about 15 minutes until chicken is tender and no longer pink.