Meanwhile, in 2-quart saucepan, melt 2 tablespoons of the butter over low heat. Add flour and cook 1 minute, stirring constantly with whisk. Slowly add milk, continuing to stir with whisk until mixture heats to boiling and thickens. Add 3/4 teaspoon salt, the nutmeg, Cheddar cheese and pumpkin. Stir until smooth.