This is an Open Face Sandwich that My mother used to make for me, my brother and sister when we were growing up. Then I made it for my children and husband. They always enjoyed it, and we still do. My youngest couldn't pronounce Sandwich so she called it Samo, this is where the word Samo comes from.
Butter each slice of bread on each side, Broil for 2 minutes on one side in broiler pan or cookie sheet. Pull from broiler, turn slices over, place cheese on bread 1st, sliced avocados 2nd, red onions 3rd, sprinkle salt and nutmeg sparingly on top. Place in Broiler about 5 minutes or till cheese is melted. Serve Hot great with Tomato Soup.
If you like Monterey Jack, Jalapeño Cheese, these are great for this sandwich.