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Grilled Onion Potato Salad: A Twist on a Classic

The aroma of a summer barbecue always brings me back to my childhood. I can almost feel the sun on my skin and hear the laughter echoing in the backyard. And no barbecue was complete without my Aunt Carol’s potato salad. While her original recipe was a closely guarded secret, I’ve spent years experimenting to create my own version that captures that same sense of home. This Grilled Onion Potato Salad does just that. The smoky sweetness of the grilled onions elevates this classic side dish to a whole new level, making it the perfect accompaniment to any grilled masterpiece.

Recipe Overview

Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 3 hours 50 minutes (includes chilling)
Servings: 8
Dietary Type: Vegetarian

Ingredients

1 large onion
1 tablespoon olive oil
1/3 cup milk
1 teaspoon cider vinegar
1/2 cup mayonnaise
1/2 teaspoon salt
1/4 teaspoon ground black pepper
2 lbs red boiling potatoes (about 5-6 medium)
2/3 cup sliced celery

Equipment Needed

Grill
Large pot
Large bowl
Whisk
Cutting board
Knife

Instructions

Heat your grill to medium-high heat. Ensure the grates are clean to prevent sticking.
Slice the onion into slices slightly larger than 1/4-inch thick. This thickness allows the onions to cook through without falling apart on the grill.
Brush both sides of each onion slice with olive oil. The oil helps prevent sticking and promotes even browning.
Place the onion slices on the grill and cook for 4-5 minutes per side, or until they are brown, tender, and slightly charred. Watch them closely to prevent burning, adjusting the heat as needed. The goal is to achieve a caramelized sweetness.
Let the grilled onion cool slightly, then chop it into smaller pieces. Don’t chop them too finely; you want to retain some of the texture.
Place the potatoes into a large pot and cover with salted water. Bring to a boil and cook for about 20-25 minutes, or until the potatoes are just tender when pierced with a fork. Avoid overcooking, as this will make them mushy.
Drain the potatoes and let them cool enough to handle.
Once cooled, peel the potatoes and cut them into 3/4-inch pieces. This size is ideal for absorbing the flavors of the dressing without becoming too small.
In a large bowl, stir the milk and cider vinegar together. Let the mixture sit for 1-2 minutes to thicken. This creates a sort of faux buttermilk, adding a subtle tang to the dressing.
Whisk in the mayonnaise, salt, and pepper until well combined. Taste and adjust seasonings as needed.
Stir in the chopped grilled onions into the dressing.
Add the potatoes to the bowl and gently stir to coat them with the dressing.
Add the sliced celery and stir gently to combine. The celery adds a refreshing crunch that complements the other flavors.
Cover the bowl tightly and refrigerate for at least 3 hours, or preferably overnight, before serving. This allows the flavors to meld together and the salad to chill thoroughly.

Expert Tips & Tricks

Grilling the Onions: For an even smokier flavor, use wood chips like hickory or mesquite in a smoker box on your grill. Alternatively, you can use a grill pan for easier cleanup.
Potato Selection: Red boiling potatoes are ideal because they hold their shape well during cooking. Yukon Gold potatoes can also be used, but be careful not to overcook them.
Dressing Consistency: If the dressing is too thick, add a tablespoon or two of milk to thin it out. Conversely, if it’s too thin, add a little more mayonnaise.
Make-Ahead Tip: The potato salad can be made up to 2 days in advance. However, the celery is best added closer to serving time to maintain its crunch.
Flavor Boost: For an extra layer of flavor, try adding a tablespoon of Dijon mustard to the dressing. A pinch of smoked paprika also complements the grilled onion flavor beautifully.

Serving & Storage Suggestions

Serve the Grilled Onion Potato Salad chilled as a side dish at barbecues, picnics, or potlucks. It pairs well with grilled meats, chicken, burgers, and vegetarian options like veggie burgers or grilled portobello mushrooms. Garnish with a sprinkle of fresh chopped parsley or chives for a pop of color.

Store leftovers in an airtight container in the refrigerator for up to 3-4 days. The quality may decline slightly after the first day, as the potatoes tend to absorb the dressing. Freezing is not recommended, as the texture of the potatoes will change significantly upon thawing. Potato salad should not be left at room temperature for longer than 2 hours, as this increases the risk of bacterial growth.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	129.3 kcal	N/A
Calories from Fat	N/A	15%
Total Fat	2.2 g	3%
Saturated Fat	0.5 g	2%
Cholesterol	1.4 mg	0%
Sodium	162.4 mg	6%
Total Carbohydrate	25.4 g	8%
Dietary Fiber	2.5 g	10%
Sugars	1.9 g	N/A
Protein	2.7 g	5%

Variations & Substitutions

Vegan Option: Substitute the milk with almond milk or soy milk, and use vegan mayonnaise.
Spice It Up: Add a pinch of cayenne pepper or a dash of hot sauce to the dressing for a spicy kick.
Herbaceous Twist: Mix in fresh herbs like dill, chives, or tarragon for a more complex flavor profile.
Bacon Addition: Crumble cooked bacon into the potato salad for a savory, smoky addition.
Vinegar Variety: Experiment with different types of vinegar, such as white wine vinegar or apple cider vinegar, for subtle variations in the dressing’s tanginess.

FAQs (Frequently Asked Questions)

Q: Can I use a different type of onion?
A: Yes, you can use other types of onions like sweet onions or red onions. However, the grilling time may need to be adjusted based on their moisture content.

Q: Can I skip the grilling step?
A: While you can skip grilling the onions, it significantly impacts the flavor of the salad. Grilling caramelizes the onions, adding a smoky sweetness that’s key to the recipe’s unique taste.

Q: How do I prevent the potatoes from becoming mushy?
A: Avoid overcooking the potatoes. They should be just tender when pierced with a fork. Also, let them cool slightly before peeling and cutting to prevent them from absorbing too much water.

Q: Can I add other vegetables?
A: Absolutely! Consider adding diced bell peppers, radishes, or hard-boiled eggs for added texture and flavor.

Q: How long does this potato salad last in the refrigerator?
A: It will last for 3-4 days in the refrigerator when stored properly in an airtight container.

Final Thoughts

This Grilled Onion Potato Salad is more than just a side dish; it’s a celebration of summer flavors. The smoky sweetness of the grilled onions combined with the creamy, tangy dressing and tender potatoes creates a symphony of textures and tastes that will have everyone coming back for seconds. So fire up the grill, gather your loved ones, and create some unforgettable memories with this delightful twist on a classic. I encourage you to try this recipe and share your feedback. Perhaps you’ll discover your own secret ingredient to make it even more special. Happy grilling!

Grilled Onion Potato Salad Recipe