If your quinoa isn't cooked, you'll need to do that first. I use the Instant Pot for this and it comes out perfect every time! Once that's done...
Preheat oven to 350°.
Pour chickpeas into a large bowl and mash with a fork or potato masher until broken down with small chunks still remaining.
Add the quinoa, bread crumbs, garlic powder, smoked paprika, cumin, salt, chili powder, sugar, and BBQ sauce.
Stir to combine well. Add more bread crumbs if the mixture is too wet, or add more BBQ sauce if it's too dry. Taste and adjust seasonings if needed.
Mold mixture into slider-sized burgers (or full-sized burgers if you're not fun) and place onto lined baking sheet. I usually just gauge the size based on how big the slider buns are, since they can vary.
Slide those in the oven (see what I did there?) and bake for 15 minutes. Flip burgers and then bake for 15 more minutes. You may need to bake a bit longer if you made these full burger sized.
Serve dressed with more BBQ sauce, red onion, lettuce, tomato, or whatever you like!