Step 1

In a large pot cook pasta according to package directions, drain, and return to the pot.

Step 2

Pour in milk, heavy cream, and vegetable broth. Stir to combine and bring to a simmer.

Step 3

Slowly stir in grated cheeses and mix well until the cheese is melted.

Step 4

Sprinkle in seasonings and mix well.

Step 5

Let simmer for 5-7 minutes, stirring occasionally.

Step 6

Place leftover brisket in a medium pot and add in beef broth and barbecue sauce. Stir well and let heat over medium heat for 3-4 minutes or until hot.

Step 7

Spoon mac and cheese into a bowl, top with brisket, and drizzle with barbecue sauce. Serve immediately.

Step 8

Optional: top with crispy onion strings