Once again my husband combined a couple of recipes to come up with this wonderful salad. Whenever the volunteer fire department has an event, my husband is always asked to bring the macaroni salad. I have to admit it, this salad is better than my mom's or even my grandma's! You have to try this!
Bring a large pot of water to a boil. Add macaroni, and cook until tender. Rinse under cold water and drain.
In a large bowl, stir together the onion, cucumber and tomatoes. Mix in the mayonnaise, condensed milk, sugar and vinegar. Add the macaroni, toss gently, cover and refrigerate for at least 8 hours. We usually make this a day ahead of time. Stir occasionally. The macaroni will absorb some of the liquid.