Healthy Salsa Verde Taco Casserole

Ingredients (for 9 servings)

• 1 tbsp — extra-virgin olive oil
• 1.5 lb — tomatillos
• 1 cup — onion
• 2 whole — jalapeño chiles
• 0.33 cup — cilantro leaves
• 2 tbsp — lime juice
• 1 package — cremini mushrooms
• 2 cup — barley
• 2 tsp — chili powder
• 1 tsp — cumin
• 0.5 tsp — garlic powder
• 2 cup — spinach
• 8 whole — corn tortillas
• 1 can — Great Northern beans
• 1 cup — corn
• 0.25 cup — nutritional yeast
• 0 — scallions and fresh cilantro leaves