Combine chiles, cilantro, oil, vinegar and garlic in small bowl. Whisk until well blended. Season with salt and pepper, to taste. Set aside.
Preheat grill to medium-high heat, about 15 minutes. Lightly brush grill grid with vegetable oil.
Grill bell peppers, zucchini, squash and onion 3 to 5 minutes per side or until fork-tender. Remove vegetables from grill: cut into bite-size pieces.
Toss cooked pasta, salsa, sliced vegetables and basil in large bowl or serving platter. Serve with dressing on lettuce leaves, if desired.