Final answer:
Roasted vegetable enchiladas are commonly topped with red or green enchilada sauce, though cream-based sauces like poblano cream are also used to add richness to the dish.
Step-by-step explanation:
The sauce that is typically served over roasted vegetable enchiladas can vary, but a common choice is a red enchilada sauce, which is made from tomatoes, chili peppers, onions, garlic, and various spices. Another popular option is a green enchilada sauce, often made with tomatillos and green chilis. Some variations of enchiladas might be topped with a cream-based sauce, such as a poblano cream sauce, which can add a rich and savory flavor to the dish.