Set your oven to 375°F and spray a sheet pan with spray oil.
Place vegetables on a sheet pan and spray them with cooking spray, and place them in the oven for 45 minutes or until soft throughout and charred on the outside.
When they are cool, peel the pepper and deseed, squeeze the cloves of garlic out and place everything in a food chopper.
Process it until your preferred consistency.
Add the olive oil and spices and refrigerate 2 hours overnight.