Kosher salt and freshly ground black pepper, to taste
2 cups water
1 cup quinoa
¼ cup olive oil, divided
1 cup shiitake mushrooms, minced
1 cup broccoli florets, minced
½ cup fresh corn kernels
2 carrots, coarsely grated
1 yellow onion, coarsely grated
1 cup matzo meal
2 teaspoons salt
½ teaspoon freshly ground black pepper
2 eggs
6 seeded brioche buns, toasted
Herb mayo
Veggie burgers
Heirloom tomatoes, for garnish
Sliced avocado, for garnish
Microgreens, for garnish
Directions
Make the herb mayo: In a blender, combine all the herb mayo ingredients. Blend until smooth, then transfer to a bowl.
Make the veggie burgers: In a 2-quart saucepan, bring the water and quinoa to a boil. Reduce the heat to a simmer and cook, covered, until the quinoa is tender and all the water is absorbed, 15 to 18 minutes. Transfer to a large bowl and let cool.
Meanwhile, in a large skillet, heat 2 tablespoons of the olive oil over medium-high heat. Add the mushrooms, broccoli, corn, carrots and onion, and cook, stirring often, until the veggies are tender and lightly caramelized, 8 to 10 minutes. Transfer to the bowl with the quinoa and let cool.
Once the vegetables-and-quinoa mixture has cooled, mix in the remaining veggie burger ingredients until incorporated. Form into six 1-inch-thick patties.
In a large nonstick skillet, heat the remaining 2 tablespoons of olive oil over medium-high heat. Working in 2 batches, cook the veggie burgers until golden brown and crisp, 3 minutes per side.
To assemble: Spread the herb mayo on the bottom halves of the buns. Place a veggie burger over each and layer with tomato, avocado and microgreens. Top with the remaining bun halves and serve.