Make the dressing: Whisk the tamari, rice vinegar, maple syrup, and toasted sesame oil in a medium bowl.
Option 1 (For Meal-Prep Salad Jars): To make 4 (16-ounce) mason jars: Add one-fourth of the dressing to each jar. Then add ½ cup cucumber, ½ cup celery, ½ cup green peas, ½ cup edamame, ½ cup quinoa, ½ cup spinach, 2 tablespoons cilantro, 2 tablespoons scallion, and 2 teaspoons sesame seeds to each jar. Refrigerate for up to 4 days. Shake before serving. Add fresh lime juice to taste. Or make 2 (32-ounce) jars and double the ingredients for a high-protein, more satisfying main dish.
Option 2: Transfer the cucumber, celery, green peas, edamame, quinoa, spinach, cilantro, scallion, and sesame seeds to a large bowl. Add the dressing and mix to combine.
