Vegetarian Frito Pie

Name: Vegetarian Frito Pie
Ingredients: 2 dried chiles (such as New Mexico, guajillo, or Anaheim), stems and seeds removed; 2 Tbsp. dried oregano; 1 Tbsp. ground cumin; ½ cup raw walnuts; 1 Tbsp. extra-virgin olive oil; 2 large white onions, finely chopped; 8 oz. shiitake or crimini mushrooms, coarsely chopped; 1 Tbsp. Diamond Crystal or 1¾ tsp. Morton kosher salt, plus more; 2 14-oz. cans beans (such as pinto, kidney, and/or cannellini), rinsed; 6 garlic cloves; 1–2 jalapeños, halved, seeds removed; 1 28-oz. can crushed tomatoes, preferably fire-roasted; 3 Tbsp. soy sauce; 3 Tbsp. tomato paste; Freshly ground pepper; 1 9.25-oz. bag Fritos, divided; 4 oz. cheddar, coarsely grated (about 1 cup), divided; Coarsely chopped cilantro, thinly sliced scallions, sour cream, and thinly sliced jalapeños (for serving; optional)