Heat olive oil in a large skillet over medium heat then add onions and a dash of salt. Cook, stirring every so often until onions reach a caramel brown color, 25-30 minutes. Set aside.
Combine ingredients for the Smokey Mayo in a bowl then stir to combine and set aside in the fridge.
Add ground beef, hummus, crushed chex or panko bread crumbs, salt, and pepper in a large bowl then combine with your hands and form mixture into 4 patties. Grill over medium-high heat on one side until a crust forms, 3-4 minutes, then flip and grill for 3-4 minutes on the other side. Do not undercook or burgers can be crumbly. Place burgers onto buns then add caramelized onions, Smokey Mayo, and additional toppings.
Notes
Feel free to cook the burgers in a large skillet on the stove instead of on the grill.