Grab a cast iron skillet or heavy pan. Add the cheeses, then pile on the brisket, jalapenos, and pico de gallo. Keep it in piles for now. Save some brisket and pico for garnish at the end.
Pour over the heavy whipping cream and sprinkle on the seasonings.
Bake for 15 minutes, stirring every 5 minutes to incorporate everything. Once melted and bubbly, remove from oven. Stir again to mix. Garnish with extra brisket and pico de gallo. Serve hot.