- 1/2 cup mayonnaise
- 1 small red onion, finely chopped
- 1 small red bell pepper, diced
- 1 small green bell pepper, diced
- 1 small cucumber, diced
- 2 tablespoons chopped fresh parsley
- 1 tablespoon Dijon mustard
- 1 tablespoon white vinegar
- Salt and pepper, to taste