In a small bowl, whisk together ¼ cup olive oil, juice from 1 lemon, 1 teaspoon Italian seasoning, ½ teaspoon garlic powder, ½ teaspoon salt, and ½ teaspoon black pepper.
Thread 2 cups cremini mushrooms, 1 cup cherry tomatoes, 1 chopped red bell pepper, 1 chopped green bell pepper, 1 chopped red onion, 1 sliced zucchini, and 1 sliced yellow squash onto skewers.
Use a basting brush to coat the vegetables evenly with the marinade.
Preheat a grill to medium-high heat.
Grill the vegetable kabobs for 3–5 minutes per side until the vegetables reach your desired tenderness.
Serve immediately and enjoy.
Recipe Notes:
Skewers – if using wooden skewers, soak in water at least 30 minutes before using
If using metal skewers, handle with care using a hot pad