Prepare the dressing by mixing the mayonnaise and milk until well combined, add the sugar and stir.
Cut the broccoli into bite-size pieces and cut the onion into thin bite size slices.
In a large bowl combine broccoli, cooked bacon, sliced almonds (optional) and mix well.
Add the vinegar to the mayonnaise mixture. Stir dressing into the broccoli mixture until well coated.