Mason Jar Salad with Creamy Pesto Dressing

For Pesto Dressing, in a small blender or food processor combine the first six ingredients (through sea salt). Cover and blend until smooth, gradually adding plant-based milk. Dressing will be thin. In four 1-quart wide-mouth Mason jars, pour a few tablespoons of dressing into the bottom. Then layer the next seven ingredients (spinach through onion) in the order given. Season with salt and pepper. Prep-time: 20 MINUTES / Ready In: 40 MINUTES Makes 8 to 10 cups Serving size: 2 cups