To make the dressing, combine all the dressing ingredients in a jar with a tight-fitting lid. Close the lid, and then shake to combine.
To make the salad, layer the salad ingredients in the order listed into the jar, packing in as much spinach as you need to create a tight pack. Cover the jar, and place it in the fridge for up to 2-3 days.
To eat, dump the entire contents of the jar into a bowl, toss, and enjoy!