Mushroom and Eggplant Veggie Burgers

Name: Mushroom and Eggplant Veggie Burgers
Ingredients: 1 pound mushrooms, quartered; 1 onion, sliced into 1/4 inch thick discs; 1 tablespoon oil; 1/2 teaspoon thyme, chopped; salt and pepper to taste; 1 small eggplant; 3/4 cup dry pearl barley; 1 (14-ounce) can chickpeas, drained and patted dry; 2 cloves garlic, grated; 1 ounce dried mushrooms, pulsed in food processor to form meal; 1 tablespoon miso paste; 1/4 cup parmesan, grated (omit for vegan); 1 tablespoon Worcestershire sauce (omit for vegetarian); 1 tablespoon Montreal steak seasoning (optional); 1 cup toasted cashews, pulsed in food process to form meal; 1 1/2-cups panko breadcrumbs (or breadcrumbs) (gluten-free for gluten-free)