Sprinkle chicken with 1/2 teaspoon salt and 1/4 teaspoon pepper.
Brown the chicken pieces in hot oil in a large skillet over medium-high heat; remove chicken, and set aside.
Add onion to the skillet, and sauté 5 minutes over medium heat, or until transparent. Add minced garlic; sauté 1 minute. Stir in tomatoes, tomato paste, and chicken broth. Add bell pepper, oregano, basil, and remaining salt and pepper.
Return chicken to skillet; cover and simmer over medium-low heat 45 minutes or until chicken is tender. Add mushrooms and wine; cook, uncovered, 40 minutes. Serve with hot cooked linguine.