Trim leaves from cauliflower, leaving 1 in. of stem for support. Place in Dutch oven; add hot water that covers stem but does not touch head. Cover and steam until tender, about 12-15 minutes. Meanwhile, melt butter in a small saucepan; blend in flour and salt. Add milk. Cook and stir over medium heat until thickened and bubbly; cook and stir 1 minute longer. To serve, cut off stem and place cauliflower in a serving dish. Spoon the sauce over and sprinkle with cheese, almonds and paprika. Accompany with green beans if desired.