Preheat oven to 425ºF. Lightly brush a baking sheet with oil.
Place beans in a large mixing bowl and lightly mash.
Add beef, shallot, herbs, bread crumbs, egg, garlic, salt, pepper, and optional mix-ins. Mix until just combined.
Create 8 patties with your hands and place on the pan, spaced at least 1” apart.
Cook 10-12 minutes or until cooked through to 155ºF. Serve on toasted buns with toppings to YOUR taste. Enjoy!