Prep the Vegetables: Roughly chop the onion, carrots, and celery. Mince the garlic and slice the ginger.
Combine Ingredients: In a large pot, combine the water, chopped vegetables, garlic, ginger, turmeric, black peppercorns, bay leaf, and apple cider vinegar.
Simmer: Bring the mixture to a boil, then reduce the heat to low and let it simmer for at least 30 minutes to an hour. The longer it simmers, the more flavorful it will become.
Strain: Carefully strain the broth through a fine-mesh sieve or cheesecloth to remove the solids.
Season: Season with salt and pepper to taste.
Enjoy: Drink it warm as is, or use it as a base for your favorite soups and stews.