Grilled Potato and Onion Packets: A Flavorful Side Dish for Any Grill

I can still smell the smoky aroma wafting from Dad’s ancient charcoal grill, the sizzle of potatoes and onions a symphony of summer. Every family barbecue seemed to feature these foil packets, bubbling with tender vegetables infused with a subtle mustard tang. We’d tear them open with anticipation, the steam releasing a cloud of savory goodness that signaled the start of a truly memorable meal. Even though my brother and I swore we hated mustard at the time, we always devoured every last bite. These packets are a simple pleasure, a reminder of carefree summer days and the joy of gathering around a shared table.

Recipe Overview

• Prep Time: 20 minutes
• Cook Time: 25 minutes
• Total Time: 45 minutes
• Servings: 6
• Dietary Type: Vegetarian

Ingredients

• 2/3 cup olive oil
• 1 tablespoon Dijon mustard
• 2 tablespoons chopped fresh thyme (or 1 T dried)
• 1 teaspoon salt
• 1 teaspoon ground black pepper
• 2 lbs white potatoes, peeled, sliced 1/4 inch thick (about 4 large)
• 2 large red onions, peeled and sliced 1/2 inch thick
• Nonstick cooking spray

Equipment Needed

• Large bowl
• Whisk
• Six 18×9 inch sheets of heavy-duty aluminum foil

Instructions

1. In a large bowl, whisk together the olive oil, Dijon mustard, chopped fresh thyme, salt, and ground black pepper. This creates a flavorful marinade that will infuse the potatoes and onions as they cook.

2. Add the sliced potatoes and onions to the bowl with the mustard oil mixture. Toss thoroughly to ensure all the vegetables are evenly coated. This step is crucial for achieving consistent flavor in every bite. Don’t be afraid to use your hands to gently massage the mixture, ensuring every piece is glistening with the marinade.

3. Lay out six 18×9 inch sheets of heavy-duty aluminum foil on your work surface. Spray the inside of each sheet with nonstick cooking spray. This prevents the potatoes and onions from sticking and makes serving much easier.

4. Divide the potato and onion mixture evenly between the foil sheets. Place the vegetables in the center of the left half of each sheet. You want to ensure there’s enough room to properly seal the packets.

5. Fold the right half of the foil over the vegetables and fold the edges of the packets together tightly to seal well. It’s important to create a tight seal to trap the steam and allow the potatoes and onions to cook evenly. A well-sealed packet will also prevent any of the flavorful juices from escaping during grilling. Start by folding the top edge over a couple of times, then fold the sides in the same manner, pressing firmly to create a secure seal.

6. Grill the foil packets for about 25 minutes over medium-high heat. Rotate the packets occasionally to ensure even cooking. The cooking time may vary slightly depending on your grill and the thickness of your potato slices.

7. Carefully open the packets to avoid being burned by the escaping steam. Use tongs or oven mitts for protection. The potatoes should be tender and easily pierced with a fork, and the onions should be softened and slightly caramelized.

Expert Tips & Tricks

• Pre-Slicing: For faster prep, slice the potatoes and onions ahead of time (up to 24 hours) and store them in cold water to prevent browning. Drain them well before tossing with the marinade.
• Herb Power: Experiment with other fresh herbs like rosemary, oregano, or parsley. A combination of herbs can add a complex and aromatic dimension to the dish.
• Smoke Enhancement: For a more pronounced smoky flavor, add a few wood chips (hickory or mesquite) to your grill. Soak the chips in water for at least 30 minutes before adding them to the coals.
• Mustard Adjustment: If you’re hesitant about the mustard flavor, start with a smaller amount and taste as you go. You can always add more, but you can’t take it away!
• Don’t overcrowd the grill: Make sure the foil packets have enough space around them for the heat to circulate. Overcrowding can lead to uneven cooking.
• Oil leftover: There will be some oil left in the bowl after you have tossed the potato mixture in the foil. You don’t need all the oil.

Serving & Storage Suggestions

Serve the grilled potato and onion packets immediately after grilling. The steam rising from the open packets adds to the visual appeal. Garnish with a sprinkle of fresh thyme or parsley for a pop of color.

Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, you can either microwave them until heated through, or re-wrap them in foil and warm them on the grill or in a 350°F oven until heated through.

Nutritional Information

(Estimated values per serving)

Nutrient	Amount per Serving	% Daily Value
Calories	368 kcal	N/A
Total Fat	24.3 g	37%
Saturated Fat	3.4 g	16%
Cholesterol	0 mg	0%
Sodium	781 mg	32%
Total Carbohydrate	36.1 g	12%
Dietary Fiber	4 g	16%
Sugars	3.5 g	N/A
Protein	3.5 g	6%

*Percent Daily Values are based on a 2,000 calorie diet.

Variations & Substitutions

• Sweet Potato Version: Substitute half of the white potatoes with sweet potatoes for a sweeter and more colorful side dish.
• Add Veggies: Incorporate other vegetables like bell peppers, zucchini, or mushrooms for added flavor and nutrition.
• Spicy Kick: Add a pinch of red pepper flakes to the marinade for a spicy twist.
• Vegan Cheese: Sprinkle some vegan Parmesan cheese over the potatoes and onions before sealing the packets for a cheesy flavor.
• Different Onion: Replace the red onion with yellow or white onion for a slightly different flavor profile.
• Different Herb: Experiment with fresh rosemary or oregano in place of thyme.

FAQs (Frequently Asked Questions)

Q: Can I prepare these packets ahead of time?
A: Yes, you can assemble the packets up to a few hours in advance and store them in the refrigerator until ready to grill.

Q: Do I need to use heavy-duty aluminum foil?
A: Yes, heavy-duty foil is recommended to prevent tearing and leakage during grilling.

Q: How do I know when the potatoes are done?
A: The potatoes are done when they are tender and easily pierced with a fork.

Q: Can I cook these in the oven instead of on the grill?
A: Yes, you can bake the packets in a preheated oven at 400°F (200°C) for about 30-40 minutes, or until the potatoes are tender.

Q: Can I add meat to these packets?
A: Absolutely! Consider adding sliced sausage, chicken, or steak to the packets for a complete meal. Adjust the cooking time accordingly to ensure the meat is fully cooked.

Final Thoughts

These grilled potato and onion packets are more than just a side dish; they’re a taste of summer, a reminder of simple pleasures, and a testament to the power of good food shared with loved ones. The subtle mustard flavor elevates the humble potato and onion to a culinary delight, and the easy preparation makes this recipe a weeknight winner. So, fire up your grill, gather your family and friends, and experience the joy of these flavorful packets. I’m confident that they’ll become a staple at your summer barbecues, just as they have at mine. And, if you’re feeling adventurous, consider pairing them with grilled steak or chicken for a truly unforgettable meal!