Step 1

Prepare a grill for medium-high, direct heat. Clean and oil grate. Shred tofu using the large holes of a box grater. Firmly squeeze tofu in between paper towels to drain as much excess liquid as possible.

Step 2

Heat 2 Tbsp. oil in a large nonstick skillet over medium. Cook tofu and beans, tossing occasionally, until beans look slightly dried out and their skins are darkened, 10–12 minutes.

Step 3

Meanwhile, whisk almond butter and mayonnaise in a medium bowl until smooth. Whisk in garlic, chili powder, and salt. Add tofu-bean mixture and cooked quinoa and stir well to combine.

Step 4

Stir flaxseed and ¼ cup cold water in a small bowl. Let sit until a thick paste forms, about 1 minute. Add to tofu-bean mixture along with cornstarch and stir well to combine.

Step 5

Using oiled hands, form mixture into 8–10 patties about ½" thick (about a scant ¾ cup each). Grill until lightly charred around the edges, about 2 minutes. Turn carefully using a metal spatula to cleanly lift off grate and grill until lightly charred on second side and warmed through, about 2 minutes more.

Step 6

Place burgers on bottoms of buns. Pile high with pickled onions, tomato, lettuce, pickles, and chipotle yogurt. Close with top bun and serve.

Step 7

Do Ahead: Patties can be formed 3 days ahead. Tightly wrap each in plastic and chill.