1 cup half & half or light cream
1/8 tsp pepper
Preheat oven to 350. Cook bacon until crisp, Drain on paper towel and crumble.
Cook onion in bacon drippings till tender and golden brown. Set aside.
Cook macaroni according to package directions, drain and place in 1 1/2 qt. casserole dish. Add crumbled bacon, onions, 1 1/2 cps of the mozzarella, all the blue cheese, half and half or cream, and pepper. Toss gently to combine.
Bake uncovered for 20 min.. Stir gently. Top with the remaining mozzarella, bake 10 more min. or until top of casserole is brown & bubbly. Let stand 10 min.