Wildly Pink Pickled Red Onions - cooking recipe

Ingredients

3 quarts water
1 quart vinegar
1/2 cup salt
2 1/2 cups sugar
2 tablespoons pickling spices, wrapped in cheesecloth
3 red onions, shaved (large ones)
2 ounces grenadine (optional)

Preparation

Sterilize a 1-quart Mason jar. Bring first 5 ingredients to a boil. Add onion and return to a boil. Turn off heat. Add grenadine.
Transfer hot onions to jar. Top up jar with liquid, leaving 1/2-inch head space. Place top and band on jar. Place jar in boiling water to cover for 45 minutes.
Remove jar and let cool at room temperature. Tighten lid all the way.