Veggie Burgers with Zucchini and Corn

Hearty vegetarian burgers made with a flavorful mixture of zucchini, corn, white beans, and millet, topped with melted white cheddar, grilled onions, and a zesty basil-lime mayo. These plant-based patties are crispy on the outside and tender on the inside.

4 servings
1 hr 11 min

Ingredients

  • 1 large large onion
  • 1 clove garlic
  • ½ cup cornmeal
  • cups zucchini
  • cup white beans
  • ¼ cup frozen corn
  • 2 tablespoons vegetable oil
  • ¾ cup cooked millet or white quinoa
  • ½ cup basil
  • 1 teaspoon kosher salt
  • 1 teaspoon black pepper
  • cup mayonnaise
  • teaspoons lime zest
  • teaspoons lime juice
  • 4 slices white cheddar
  • 4 buns hamburger buns
  • 1 head Green leaf lettuce
  • 1 whole avocado
  • cubed
  • lightly smashed

Cooking Instructions

  1. 1.

    Cut onion in half crosswise. Slice one-half into 1/4" rings; set aside. Finely chop remaining onion. Pulse chopped onion, garlic, cornmeal, 3/4 cup zucchini, 2 Tbsp. beans, and 2 Tbsp. corn in a food processor until finely chopped, 30-45 seconds.

    3 min

  2. 2.

    Heat 1 Tbsp. oil in a large skillet over medium. Add chopped onion mixture and cook, stirring occasionally, until mixture begins to soften and thicken, 3-4 minutes. Add remaining 3/4 cup zucchini and cook, stirring occasionally, until zucchini begins to soften and become translucent, 3-4 minutes more.

    8 min

  3. 3.

    Transfer mixture to a large bowl and gently mix in millet, 1/4 cup basil, 3/4 tsp. salt, 3/4 tsp. pepper, and the remaining beans and corn until well combined. Form mixture into 4 (1"-thick) patties. Cover with plastic and freeze 20 minutes.

    25 min

  4. 4.

    Meanwhile, combine mayonnaise, lime zest, lime juice, and remaining 1/4 cup basil in a small bowl; set aside.

    5 min

  5. 5.

    Prepare a grill for medium-high heat or heat a grill pan or cast-iron skillet over medium-high; oil grate or pan. Toss reserved onion rings with 1 Tbsp. oil and remaining 1/4 tsp. salt and 1/4 tsp. pepper. Cook onion rings until softened and lightly charred, about 5 minutes.

    10 min

  6. 6.

    Brush patties all over with oil. Cook, flipping once, until medium brown and toasted, about 7 minutes on each side; add 1 slice cheese to each during last 3 minutes of cooking. Transfer onions and burgers to a plate. Toast buns until golden brown, about 30 seconds.

    15 min

  7. 7.

    Place 1 piece lettuce on each bottom bun and top with a burger. Top with onions. Spread 1 Tbsp. basil mayonnaise on each top bun, add smashed avocado, and close sandwiches.

    5 min