Which greens you use and what you add or omit are optional and can change from day to day, season to season – it’s the dressing that makes this salad so good.
Combine oil, vinegar, syrup, mustard, and garlic, if desired, in a mason jar. Cover tightly and shake vigorously until ingredients are well combined. Place remaining ingredients in a large salad bowl and toss with enough dressing to coat (but not soak). Serve immediately.