Mushroom Burgers

Ingredients

• 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
• Sliced tomatoes and mayonnaise, optional