1/2 c. mayonnaise
1/2 tsp. horseradish
1/2 tsp. mustard
3 scallions OR green spring onions, chopped fine
3/4 lb. Monterey Jack cheese, grated
1/4 lb. Cheddar cheese, grated
2 pkgs. smoked beef, sliced, cut up (5 oz. total)

Mix all of above thoroughly. Divide evenly on 12 toasted English muffin halves. Bake in moderate oven until cheese is bubbly.