• 2 cups finely chopped fresh mushrooms
• 2 large eggs, lightly beaten
• 1/2 cup dry bread crumbs
• 1/2 cup shredded cheddar cheese
• 1/2 cup finely chopped onion
• 1/4 cup all-purpose flour
• 1/2 teaspoon salt
• 1/4 teaspoon dried thyme
• 1/4 teaspoon pepper
• 1 tablespoon canola oil
• 4 whole wheat hamburger buns, split
• 4 lettuce leaves

1. In a large bowl, combine the first 9 ingredients. Shape into four 3/4-in.-thick patties.
2. In a large cast-iron or other heavy skillet, heat oil over medium heat.
3. Add burgers; cook until crisp and lightly browned, 3-4 minutes on each side.
4. Serve on buns with lettuce.