easy chicken casserole

Ingredients

• 4 cups chicken, cooked and cut up into bite size pieces
• 2 - celery stalks, chopped
• 1 - medium onion, chopped
• 1 package frozen mixed vegetables (peas, carrots)
• 6 tablespoons butter
• 6 tablespoons flour
• - milk, as needed
• 1 tablespoon chicken soup base
• - chicken broth, as needed
• - salt and pepper to taste
• - french fried onions, if desired
• BISCUITS
• 1 1/2 cups flour
• 2 teaspoons baking powder
• 5 tablespoons shortening
• 1 1/4 teaspoons sugar
• 1/4 teaspoon salt
• 1/2 cup milk