Maple Pickled Jalapeños – Food in Jars

Ingredients

• 3 pounds firm jalapeño (sliced into ¼ inch rounds)
• 1 red onion (quartered, then thinly sliced)
• 1 cup maple syrup
• 1 cup sugar
• 3 cups apple cider vinegar
• 1 ½ cups water
• 3 teaspoons pickling salt
• 2 teaspoons mustard seeds
• 2 teaspoons black peppercorns