Heat 1 tablespoon of the oil in a large pan over medium-high heat
Add mushrooms, onion, and garlic, and saute until onions and mushrooms are softened, about 3 minutes
Stir in chilli powder and cumin, cooking until fragrant. Remove from heat and set aside
In a food processor, add beans, lentils, rolled oats, egg, lime juice, chipotle pepper, adobo sauce and cilantro
Pulse in the processor until mixture is combined but still chunky. Stir in the onion mushroom mixture.
Over medium high, heat a large pan with enough vegetable oil to cover pan
With your hands, form 6 fairly large patties into balls, flattening between your palms.
Fry patties until crisp, about 5 minutes per side.
In a small bowl, stir together mayonnaise and adobo sauce to make chipotle mayo.
Serve topped with chipotle mayo on buns with fixings, (avocado slices, lettuce, red onion, pickles, and salsa)
Notes
These patties are best when they are fried. You can bake them, but they will be drier, and won't hold together as well.Calories indicated include the bun and toppings