Food & Cooking Recipes Lunch Recipes Mixed Grilled Vegetables 3.0 (11) 1 Review By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 16, 2017 Print Share Share Tweet Pin Email Prep Time: 15 mins Total Time: 35 mins Servings: 8 Grilling these vegetables brings out their natural sweetness. Ingredients 1 ½ tablespoons olive oil, plus more for grates 2 red onions, cut into ¾-inch-thick rounds 2 yellow squash (1 ½ pounds total), cut into ½-inch-thick slices on the diagonal 2 red bell peppers (ribs and seeds removed), cut into 2-inch-wide pieces 2 yellow bell peppers (ribs and seeds removed), cut into 2-inch-wide pieces Coarse salt and ground pepper Directions Preheat grill to high; lightly oil grates. Insert two 8-inch-long metal or presoaked wooden skewers through onion slices horizontally. Place prepared skewers and remaining vegetables on one or two rimmed baking sheets. Drizzle with oil; season with salt and pepper. Working in batches if necessary, remove from baking sheets; arrange on grill. Cook, turning occasionally, until lightly browned and tender, 4 to 8 minutes for squash and 8 to 12 minutes for onions and peppers. Remove skewers, and serve. Cook's Notes Wooden skewers need to be soaked for 30 minutes to prevent them from catching fire on the grill. Print