Alternate slices of persimmon and fresh mozzarella in a wreath-shaped pattern on a round, lipped plate. Set aside.
Add pesto, lemon zest, lemon juice, stone-ground mustard, maple syrup, olive oil, salt and pepper to a jar. Secure the lid and shake vigorously for 20 to 30 seconds, until well combined.
Spoon dressing onto the persimmon and mozzarella slices. Top with toasted walnuts and microgreens. Serve.
Store extra dressing in an air-tight container in the refrigerator for up to a week.
Notes
Use more firm fuyu persimmons for best results. You also can slice them using a mandoline for even slices.