Creamed Chicken and Biscuits

1/2 large onion, diced

1 1/2 t butter

6 cups chopped cooked chicken

2 cans cream of chicken soup

1 1/2 c sour cream

1 cup milk

1/2 c chopped pimiento, optional

2-3 cups frozen pea and carrot mix

1 1/2 cup shredded cheddar cheese

frozen biscuits, thawed (or freshly made biscuits)

Preheat oven to 350 degrees.  Grease bottom and sides of a 9x13 in. pan.  Saute onion in butter.  Combine onion, chicken, soup, sour cream, milk and pimiento in a medium bowl and mix well.  Spoon mixture into dish and bake for 15 minutes.  Remove from oven and sprinkle with most of cheddar cheese.  Arrange biscuits over top and sprinkle with remaining cheese.  Bake until biscuits are golden brown and sauce is bubbly--about 20 minutes longer.  Serve immediately.