Line a large baking sheet with parchment paper. Preheat the oven and bake the waffle fries according to package instructions.*

Meanwhile, prep and chop all the toppings (tomatoes, red onion, jalapeños, cilantro, and brisket). If you're using cold leftover brisket, reheat it in the microwave or on the stove.

To make the queso, melt the unsalted butter in a small saucepan over medium heat. Add the yellow onions and diced jalapeño, sautéing until softened.

Add the cheese along with half the milk and whisk until melted. Slowly whisk in the remaining milk, mixing until smooth. It will thicken more as it cools.

To assemble the fries, top them with the cooked brisket and queso followed by the tomatoes, red onion, jalapeños, and cilantro. Drizzle with Mexican crema or sour cream and enjoy right away.