Place bacon in a large, deep skillet. Cook over medium-high heat until crisp and evenly browned, 8-10 minutes. Transfer to a paper towel-lined plate and crumble when cool enough to handle.

Combine bacon, broccoli, cheese, and onion in a large bowl.

Whisk mayonnaise, red wine vinegar, sugar, pepper, salt, and lemon juice together in a small bowl; pour over salad and toss to combine. Cover and refrigerate until ready to serve.