Salad with Apples and Red Onion

I like to serve this salad as an accompaniment to Pasta with Pumpkin and Sausage.

Serves 4

1 pound of fresh baby spinach leaves
1 small crisp apple cored, quartered and sliced
1/4 of small red onion thinly sliced
1/4 cup olive oil
2 tablespoons apple cider vinegar
1 teaspoon grainy mustard
1 tablespoon honey
salt and pepper to taste

Put the spinach, apple and onion in a large salad bowl. In a small mixing bowl whisk together the oil, vinegar, mustard, honey, salt and pepper. Pour over the greens and toss to coat.