1 tablespoon vegetable oil
4 skinless, boneless chicken breast halves
1 3/4 cups Swanson® Chicken Stock
1 teaspoon dried oregano leaves, crushed
1 teaspoon garlic powder
1 (14.5 ounce) can diced tomatoes 1 small green pepper, cut into 2- inch long strips
1 medium onion, cut into wedges 1/4 teaspoon ground black pepper
2 1/2 cups uncooked medium shell-shaped pasta
