Empty pkg of mixed vegetables into microwave safe dish and pre-cook for 5-6 minutes. Place chicken breast onto plate and cut into smaller pieces. Melt butter in large saucepan over medium heat. Whisk in flour, a little at a time, until smooth. Gradually whisk in evaporated milk. Lower heat some and cook, stirring constantly, until mixture comes to a boil. Then slowly stir in chicken broth. Add vegetables and chicken breast chunks, along with seasonings. Heat through on medium-low heat until vegetables finish cooking.