Spinach/Orange Salad with Maple/Mustard Dressing

This salad is one I made up. It's easy for a weeknight salad, and I often leave out the almonds if I don't have them. It's also good with feta.

Spinach and Orange Salad with Maple/Mustard Dressing

1 bag baby spinach or romaine (10 oz.)
sliced oranges, clementines, or mandarin oranges
1-2 oz. sliced almonds
feta (optional)
1-2 T. olive oil
1-2 T. real maple syrup
1 t. stone ground mustard
1 T. mild vinegar, such as apple cider vinegar or white vinegar
salt and pepper

In the bottom of the salad bowl, whisk together oil, maple syrup, mustard, vinegar, salt, and pepper until emulsified. Taste the dressing on one piece of spinach to correct seasonings, if necessary., Add as much baby spinach as desired, along with oranges. Toss the salad, and top with almonds and/or feta.