With so few ingredients, this salad is surprisingly substantial thanks to the protein- and fiber-packed white beans. Tender spinach, zippy red onion and a bold Dijon dressing fill out this simple salad that works as a main dish or side.
In a large mixing bowl combine beans and onion. Slice spinach into thin ribbons and add to the beans.
In a separate small bowl, whisk together mustard, vinegar and Italian seasoning. Pour dressing over the bean mixture and stir to combine all ingredients. Serve immediately or chill until ready to use.