Chicken Spaghetti Supper

Ingredients

• 6 boneless skinless chicken breast halves (4 ounces each)
• 3 tablespoons vegetable oil, divided
• 12 cup julienned green pepper
• 12 cup sliced onion
• 2 garlic cloves, minced
• 1 (14 1/2 ounce) can Italian-style diced tomatoes, undrained
• 1 (8 ounce) can tomato sauce
• 1 (4 1/2 ounce) jar sliced mushrooms, drained
• 1 teaspoon italian seasoning
• 1 teaspoon salt
• 12 teaspoon dried oregano
• 14 teaspoon pepper
• 4 -6 cups cooked spaghetti