Burger: Preheat oven to 425ºF. Spread cauliflower florets on a sheet tray. Drizzle with olive oil and sprinkle with salt. Toss to combine. Roast for 20–25 minutes, until golden brown and tender. Let cool.
2. Step
Combine cauliflower, chickpeas, red lentils, parsley, Frank’s Red Hot Original, lemon zest, garlic powder, paprika, cumin, salt, and pepper in a food processor. Process until everything is broken down and combined. (You will need to scrape down the sides and mix ingredients together with a spatula in between pulses.) Transfer to a bowl and stir in panko bread crumbs. Chill mixture for at least 30 minutes.
3. Step
Once mixture is chilled, shape into patties.
4. Step
Heat a large skillet over medium-low heat. Add in a generous drizzle of vegetable oil. Add in patties and cook until browned, about 4 minutes. Flip and cook the other side until browned, about 3 minutes more. Remove from pan.
5. Step
Spicy Aioli: Whisk together mayonnaise and Frank’s Red Hot Original.
6. Step
Assembly: Spread aioli on bottom bun. Place a veggie burger patty on the bun. Layer on the red onion slice, tomato slice, a few avocado slices, and lettuce. Add the top bun.
