Spinach and Apple Salad with Dijon Mustard Vinaigrette

I wanted something besides a basic salad to go with our brunch and this was perfect.

2 tablespoons water
1 1/2 tablespoons red wine vinegar
1 tablespoon olive oil
1 tablespoon honey
2 teaspoons Dijon mustard
1/4 teaspoon pepper
2 apples, cored and chopped or sliced lengthwise
8 cups torn fresh spinach
1/4 cup red onion, thinly sliced
Optional: walnuts, pecans, almonds, feta, bleu cheese (I added walnuts)

In a small bowl, whisk together water, vinegar, olive oil, honey, mustard and pepper. In a large bowl, add the apples and 2 tablespoons vinaigrette and toss to coat. Add remaining dressing, spinach and onion and toss to coat.

Source: Sparkpeople.com