Place raw sliced onions in a slow cooker with a few ingredients. Making pickled onion rings couldn't be simpler.

Pickled onion rings are a delightful addition to any meal, offering a tangy crunch that can elevate your dishes. Growing up in the Midwest, I remember my grandmother always having a jar of pickled onions in her pantry, ready to add a burst of flavor to our family dinners. This slow cooker version is perfect for those of us balancing busy schedules, as it requires minimal effort and delivers maximum taste. Whether you're a seasoned cook or just starting out, this recipe is a great way to explore the world of pickling.

These pickled onion rings are incredibly versatile. They pair wonderfully with grilled meats, adding a zesty contrast to the smoky flavors. You can also toss them into salads for an extra punch or use them as a topping for burgers and sandwiches. For a simple yet satisfying snack, try serving them alongside a cheese platter with some crusty bread.

Servings: 1 jar

2 large onions, thinly sliced into rings
1 cup apple cider vinegar
1/2 cup water
1/4 cup sugar
1 tablespoon salt
1 teaspoon mustard seeds
1 teaspoon black peppercorns
1/2 teaspoon red pepper flakes
2 cloves garlic, peeled and smashed

1. Place the sliced onion rings in the slow cooker.

2. In a separate bowl, mix together the apple cider vinegar, water, sugar, and salt until the sugar and salt are dissolved.

3. Pour the vinegar mixture over the onions in the slow cooker.

4. Add the mustard seeds, black peppercorns, red pepper flakes, and garlic to the slow cooker.

5. Cover and cook on low for 3-4 hours, or until the onions are translucent and tender.

6. Once cooked, carefully transfer the onions and liquid into a sterilized glass jar.

7. Seal the jar with a dark brown or black lid and let it cool to room temperature before refrigerating.

8. Allow the pickled onions to sit in the refrigerator for at least 24 hours before serving for the best flavor.

For a sweeter variation, increase the sugar to 1/2 cup and add a cinnamon stick to the slow cooker. If you prefer a spicier kick, add more red pepper flakes or include a sliced jalapeño. You can also experiment with different types of vinegar, such as white wine vinegar or rice vinegar, to change the flavor profile. For a more herbal note, consider adding a few sprigs of fresh dill or thyme.