Panera's Broccoli Cheddar Soup

melted butter

⁄2 medium chopped onion

⁄4 cup melted butter

⁄4 cup flour

half-and-half cream

chicken stock

⁄2 lb fresh broccoli ((about 3 cups), chopped into bite size pieces)

carrot (, julienned (can buy matchstick carrots in produce section))

⁄4 teaspoon nutmeg

grated sharp cheddar cheese ((2 cups))

salt and pepper