Preheat your oven to 400°F.
Gather all your ingredients, ensuring the onion and jalapeños are diced, and the garlic is minced.
In a medium saucepan over medium heat, melt the butter.
Add the diced onion, jalapeños, and garlic, and cook until the onion is translucent.
Add the shredded brisket to your saucepan, combining it well with the onion mixture.
Cook for a few more minutes to blend the flavors.
Transfer the mixture to an oven-safe dish.
Add cheese, pico de gallo, and heavy cream.
Stir until fully combined.
Bake in the oven for about 15-20 minutes, or until the cheese is bubbly and golden.
Once done, serve warm with your favorite chips.