Cook the Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente, about 8-10 minutes. Drain and rinse with cold water.

Prepare the Vegetables: Chop fresh broccoli, onion, and bacon into small pieces and set aside.

Make the Dressing: In a bowl, whisk together mayonnaise, red wine vinegar, sugar, salt, and pepper until smooth.

Combine the Ingredients: In a mixing bowl, combine cooled pasta, broccoli, and onion. Pour dressing over and fold gently to coat.

Let It Chill: Cover and refrigerate for at least 3 hours to allow flavors to meld. Add bacon before serving.

Serve and Enjoy: Stir in bacon and serve chilled as a side dish.