Spicy Stacked Enchiladas Verdes with Roasted Pumpkin and Cheese

Name: Spicy Stacked Enchiladas Verdes with Roasted Pumpkin and Cheese
Ingredients: 12 corn tortillas; 10 medium-large tomatillos; 2 medium tomatoes; 1 white or yellow onion; 6 cloves of garlic, peeled; 5 jalapeno or serrano chiles; 1 head cilantro, large stems removed; 1 medium pumpkin of 2.5-3 lbs (such as sugar pie or kabocha); 1/2 cup olive oil, in two equal measurements of 1/4 cup each; 2 tablespoons ground cumin, in two equal measurements of 1 tablespoon each; 2 cups shredded jack cheese; 2 cups finely grated cotija cheese; to taste, salt