Final answer:
Brisket enchiladas are often topped with cheese, sour cream, and enchilada sauce, and they are typically served with sides of rice and beans.
Step-by-step explanation:
Brisket enchiladas are typically topped with a variety of ingredients such as cheese, sour cream, and some form of enchilada sauce, which might be red or green depending on the recipe. As for the sides, these enchiladas are often served with a side of rice and beans, which are staple accompaniments in Mexican cuisine. Garnishes such as chopped onions, cilantro, or avocado might also be included to enhance the flavors and presentation of the dish.