Cook macaroni in salted water until done. Drain. Put into a med. bowl.
Preheat oven to 350º F.
Melt butter in a saucepan over medium heat. Whisk in flour. Whisk over medium heat 2 minutes. Whisk in milk. Cook over med. heat until thickened.Remove from heat.
Whisk in spices. Stir in yogurt and 1 1/2 cups of shredded cheese. Pour over macaroni and mix together with a spoon. Pour into a small buttered casserole dish. Top with remaining 1/2 cup shredded cheese.