Lightly grease the bottom of a large 9 x 13 inch casserole dish.
In a large bowl, add the roasted vegetables, black beans, adobo sauce, 1/2 cup of the sour cream sauce and salt. Mix well with a large spoon.
If you are using corn tortillas, warm them by wrapping them in damp paper towels and microwaving for 1 minute. No need to do this with flour tortillas.
Fill each tortilla with approximately 1/2 cup of the filling (less if using small corn tortillas) and roll up carefully. Place seam side down in the baking dish. Repeat until the dish is full and you have used nearly all of the filling. Top with the rest of the sour cream sauce, and spoon the remaining filling on top, in the middle, if desired. Or save and eat separately, it's delicious!
Place the enchiladas in the oven and bake, uncovered for 15-20 minutes or until hot.
Serve with chopped cilantro and green onions, if desired. Enjoy!