This is one of my favorites in the summertime. My aunt gave it to me with a beautiful salad bowl for my bridal shower. It's apparently very popular in their neighborhood. It sounds like a strange combination of ingredients, but it works.
1 bag of prewashed baby spinach (After spending a couple months of my life cleaning lettuce, chard, and spinach for a restaurant I almost always buy prewashed.)
1/4 c. toasted pecans
1 c. sliced strawberries
1/2 red onion, thinly sliced
1 1/2 T. Dijon mustard
2 T. honey
1/3 c. rice wine vinegar
1 c. vegetable oil
Combine Dijon mustard, honey, vinegar, and vegetable oil in a bowl and mix well. The dressing can be made up to 5 days in advance. In a large bowl, place spinach, pecans, strawberries, and red onion. Toss slightly, being careful not to bruise the spinach. Somehow I always manage to overdress this salad, so use the vinaigrette sparingly at first.
Depending on how strong your mustard and vinegar are, you may adjust the amounts to taste. I find that this is one of the few recipes that doesn't benefit from salt and pepper.