- 1/2 onion, chopped
- 1/3 cup white sugar
- 1/4 cup apple cider vinegar
- 1/4 cup canola oil
- 1 1/2 tablespoons prepared yellow mustard
- 1/2 teaspoon salt
- 1/2 teaspoon celery seed
- 1/4 teaspoon ground black pepper
- 1 (9 ounce) bag fresh spinach, chopped
- 2/3 cup herb-seasoned stuffing mix (such as Pepperidge Farm® Cubed Herb Seasoned Stuffing)
- 3 hard-boiled eggs, crumbled
- 1/3 cup crumbled cooked bacon
- Whisk onion, sugar, apple cider vinegar, canola oil, yellow mustard, salt, celery seed, and black pepper together in a bowl until well combined. Chill in refrigerator at least 2 hours to blend flavors.
- Mix spinach, stuffing mix, eggs, and bacon together in a large bowl. Add dressing and stir to coat.