1. Preheat oven to 350°F (175°C).
2. To make the pasilla pepper sauce, remove stems and seeds from pasilla peppers. Soak them in hot water for 20 minutes until soft.
3. In a blender, combine soaked pasilla peppers, vegetable broth, onion, garlic, and olive oil. Blend until smooth. Season with salt to taste.
4. In a frying pan, heat a little oil and lightly fry each tortilla until soft. Set aside.
5. Fill each tortilla with black beans, corn, and a bit of vegan cheese. Roll up and place seam-side down in a baking dish.
6. Pour pasilla pepper sauce over the enchiladas and sprinkle with remaining vegan cheese.
7. Bake for 20 minutes until heated through and cheese is melted.