Created by ForeverMama on September 15, 2016
Step 1: Stir together onions, cheese, and 6 tablespoons of the mayonnaise until well blended; add more mayonnaise, if necessary, to give mixture a spreading consistency.
Step 2: Arrange bread slices side-by-side in a 10 x 15-inch rimmed baking pan. Broil about 6-inches below heat until bread is toasted.
Step 3: Turn slices over and spread cheese mixture until untoasted side. Broil about 6-inches below heat until bubbly and lightly browned, about 3 minutes.
Step 4: Makes 2 dozen appetizers. The serving size above of 10-16 is a guesstimate.