Grilled Rainbow Skewers with Balsamic Drizzle

Infused with a bright balsamic vinaigrette and a hint of zesty pesto, these grilled vegetable skewers are the quintessential easy summer side dish. They perfectly complement any main course sizzling on your grill, bringing a burst of color and incredible flavor to your outdoor dining experience. The herbaceous and garlicky notes from the pesto meld beautifully with the sweetness of zucchini, yellow squash, vibrant bell peppers, and crisp red onions. These healthy, flavorful kabobs are a must-add to your grilling repertoire this season.

For another delicious option, explore our grilled vegetable halloumi kabobs recipe.

Expert Tips for Grilling Vegetable Skewers

• Uniform Cuts for Even Cooking: This is a crucial step for perfectly cooked skewers. Cut all your vegetables into roughly the same size and thickness – ideally, about 1/2-inch thick for zucchini and summer squash rounds, and 1-inch pieces for bell peppers and onions. Zucchini and squash can vary greatly in width, so if you have extra wide pieces, halve or quarter the rounds to ensure they cook at a similar rate to the other vegetables and prevent one large piece from lifting smaller ones off the grill grates.
• Quick Marination is Key for Vegetables: Unlike meats, vegetables absorb flavors very quickly. You don’t need a long marination time; simply tossing the veggies in the dressing just before threading is enough for them to pick up all that fantastic garlic and herb flavor. This also prevents them from becoming too soft or watery.
• Mastering Grill Hot Spots: Grills often have hotter and cooler zones. To achieve those coveted grill marks and beautiful char on the edges of your vegetables, learn your grill’s hot spots. Don’t hesitate to move the skewers around as you turn them, ensuring each side cooks evenly and gets that perfect smoky finish.
• Customize Your Vegetable Selection: This recipe is incredibly adaptable! Feel free to use more of one vegetable than another based on your preferences or what you have on hand. Consider adding other grill-friendly vegetables like cherry tomatoes (thread them last and cook quickly to prevent bursting), mushrooms, asparagus, or even pineapple chunks for a touch of sweetness. Just be mindful of similar cooking times.
• Avoid Delicate Tomatoes for Grilling: While delicious in many dishes, cherry tomatoes or grape tomatoes are generally not ideal for skewers. They tend to burst easily on the grill and can slip off the skewers. Plus, many find grilled tomatoes less appealing than their roasted counterparts, which offer a more concentrated flavor.
• The Rimmed Baking Sheet is Your Grilling Companion: For easy and mess-free transportation of your marinated vegetables from the kitchen to the grill, always use a rimmed baking sheet. This prevents any marinade from dripping and keeps your workspace clean.
• Versatile Cooking Methods: Don’t have an outdoor grill? No problem! These vegetable skewers cook beautifully on an outdoor charcoal or gas grill, but they are equally delicious prepared on a stovetop grill pan. If using a grill pan, wait until all your veggie kabobs are assembled before preheating it.
• Making it Vegan: If you want to ensure this recipe is completely vegan, use a vegan pesto. Traditional pesto often contains Parmesan cheese, so look for plant-based alternatives to keep it dairy-free. Many brands now offer excellent vegan pesto options.
• Don’t Overcrowd Your Skewers: Give each vegetable piece a little breathing room on the skewer. Overcrowding can lead to steaming instead of grilling, preventing those desirable char marks and even cooking.
• Metal vs. Wooden Skewers: Metal skewers are reusable and conduct heat, which can help cook vegetables from the inside out. Wooden skewers are disposable but require pre-soaking to prevent burning. Choose what works best for your grilling style.

The Art of the Perfect Vegetable Skewer

Creating beautiful and evenly cooked vegetable skewers is a simple art form. With a few thoughtful considerations, you can ensure every bite is a harmonious blend of flavor and texture:

• Combine Wisely: When threading your skewers, try to group vegetables that have similar cooking times. For instance, bell peppers and onions cook at a comparable rate to zucchini and squash. If you introduce harder vegetables like potatoes or carrots, consider pre-boiling or steaming them slightly before marinating and grilling to ensure they tenderize alongside the softer veggies.
• Aesthetic Appeal: Think about color and texture when threading. Alternating vibrant bell pepper colors with the green of zucchini and the deep red of onion creates a visually stunning skewer that is just as appealing to the eye as it is to the palate.
• Secure Threading: To prevent vegetables from spinning or falling off, especially flatter cuts like squash rounds, you can thread them through twice, creating a more secure anchor. Ensure the skewer goes through the densest part of the vegetable where possible.
• Seasoning Strategy: While the marinade provides a fantastic base, a light sprinkle of additional salt and pepper immediately after grilling can enhance the flavors even further, especially if serving right away.

Frequently Asked Questions

Here are answers to some common questions about making delicious balsamic grilled vegetable skewers:

Q: Can I prepare these vegetable skewers ahead of time?
A: You can chop all the vegetables and prepare the marinade a day in advance. Store the chopped vegetables in an airtight container in the fridge, and the marinade separately. When ready to grill, simply combine the vegetables with the marinade, thread onto skewers, and cook. We recommend marinating just before grilling for best texture.

Q: What if I don’t have an outdoor grill? Can I still make these?
A: Absolutely! These skewers can be cooked on a stovetop grill pan, as mentioned in the instructions, or even roasted in the oven. To oven-roast, preheat your oven to 400°F (200°C). Arrange the threaded skewers on a baking sheet and roast for 15-20 minutes, flipping halfway through, until the vegetables are tender-crisp and lightly caramelized.

Q: Can I add other vegetables or even some protein to these skewers?
A: Yes, this recipe is highly adaptable! Feel free to experiment with other grill-friendly vegetables like mushrooms, cherry tomatoes (add towards the end of cooking), asparagus spears, or even chunks of eggplant. For protein, you could add pre-cooked sausage, cubed halloumi cheese, or marinated tofu chunks for a more substantial meal. Just be mindful of different cooking times.

Q: How do I prevent the vegetables from sticking to the grill?
A: Several factors help prevent sticking: ensure your grill grates are clean, hot, and lightly oiled. The olive oil in the marinade also helps. Don’t flip the skewers too early; let the vegetables cook long enough to develop a slight crust, which naturally releases them from the grates.

Q: What kind of skewers are best to use?
A: Both metal and wooden skewers work well. Metal skewers are reusable and conduct heat, which can help cook the vegetables slightly faster. Wooden or bamboo skewers are disposable but must be soaked in water for at least 30 minutes before use to prevent them from burning on the grill.

More Irresistible Grilled Vegetable Recipes

If you love grilled vegetables as much as we do, be sure to try these other fantastic recipes to enhance your summer menu:

Grilled Corn Broccoli Salad
Easy Grilled Green Beans
Grilled Corn Couscous
Grilled Halloumi and Vegetables
Grilled Peach Corn and Quinoa Salad
Grilled Mushroom Corn Pizza
Grilled Veggie Pesto Sandwiches