Vegan Mushroom Menudo

Name: Vegan Mushroom Menudo
Ingredients: 3 Tbsp. vegetable oil; 3 pasilla or ancho chiles, seeds removed, rinsed; 7 guajillo chiles, seeds removed, rinsed; ½ large white onion, thinly sliced; 4 garlic cloves, peeled; ½ tsp. kosher salt; 1 tsp. dried oregano; 1 tsp. ground cumin; 12 oz. dried hominy, preferably whole kernel, soaked overnight; Kosher salt; 4 cups low-sodium vegetable broth; 3 oz. dried snow mushrooms (tremella or white fungus mushrooms); 2 Tbsp. dried oregano, plus more for serving; Chopped white onion, finely chopped cilantro, crushed red pepper flakes, warm corn tortillas, and lime wedges (for serving)