Once the vegetables are prepared, preheat the grill to 425°F.
Place the veggies onto a wire cooling rack.
Using a pastry brush, gentlry brush each vegetable with olive oil and season with salt and pepper; turn over and brush and season the other side.
Once the grill is hot, grill all of the veggies on both sides until slightly charred; the time will be different for each vegetable: onions 3 to 5 minutes each side; zucchini 2 to 3 minutes each side; bell peppers 5 to 7 minutes each side; jalapenos 3 to 4 minutes each side.
When the vegetables are done, transfer back to the wire cooling rack to cool.
Please do not pile in a bowl or overlap.
While the grilled vegetables are cooling, cook the pasta per the packing instructions.
Drain and rinse under cold running water to cool; set aside.
Using a salad dressing shaker or small bowl, whisk together the salad dressing ingredients; set aside.
Now that the veggies have cooled enough to touch, chop the bell peppers into bite-sized pieces and roughly chop the grilled onions.
To assemble, transfer the pasta to a large bowl.
Add in the grilled veggies and chopped parsley; pour in the dressing; toss gently to coat.
Serve at room temperature.