Spinach Salad with Balsamic Dressing

Spinach Salad with Balsamic Dressing
This has been a staple in the Pinch kitchen forever. I like adding thinly sliced button mushrooms, too.

4-6 cups washed baby spinach
2-3 thin slices red onion, halved
3 T balsamic vineagar (Colavita makes a good basic)
3 T extra virgin olive oil
1 t honey or sugar
pinch kosher salt
few turns fresh ground pepper

Combine balsamic, olive oil, honey or sugar, salt, peper and red onion in a large bowl. Rinse lettuce and spin well. Toss in dressing and serve.