For the sauce: Combine the ketchup, vinegar, sriracha and pepper in a small pot. Simmer, stirring occasionally, until reduced slightly, 10 to 15 minutes. Remove and refrigerate.
For the patties: Add the olive oil to a small pan on medium-high heat, then add the onion, oregano, thyme, salt, pepper and 1 tablespoon water. Stir to coat everything and cook until the onions are translucent but not browned, 3 to 5 minutes.
Meanwhile, combine the bread, egg, pesto, Worsterschire sauce, Parmesan and garlic in a medium bowl. Add the sauteed onions to the breadcrumb mixture and stir to completely combine. Break up the beef in a large bowl with your hands or a wooden spatula. Add the breadcrumb mixture and gently mix together.
Preheat the grill for cooking with direct and indirect heat at 350 degrees F or heat a pan over medium-high heat.
Evenly divide the mixture into 3 or 4 balls and form into patties. Place on the direct heat of the grill or into the pan. Cook on one side until the patties release, 5 to 6 minutes, then flip, transferring to the indirect heat of the grill. If using a pan, simply lower the heat and cover the patties with a lid or upside-down metal bowl. Cook until the internal temperature reaches 160 degrees F, 5 to 6 minutes more. Remove from the heat and let rest, covered, for 5 minutes.
For the burgers: Add a patty to each bun bottom, then top with the sauce and a pile of potato chips. Top with the bun tops. Enjoy!