Spray your disposable roasting pan with non stick spray.
Toss together carrots, zucchini, summer squash, onion, garlic, broccoli, cauliflower, and potatoes. Add to roasting pan.
Spread butter tabs evenly over veggies.
Sprinkle salt, pepper, season all, onion powder, garlic salt, celery salt and parsley over veggies.
Sprinkle crumbled bacon over veggies. Cover with foil.
Cook, covered on a grill over medium heat for about 7-10 minutes. Stir veggies and recover. Cook for an additional 7-10 minutes.
Uncover and cook for 5-10 more minutes longer until potatoes and carrots are fork tender.