Heat the butter in a cast iron skillet over medium high heat. Add the onion and saute for 1 minute. Add the garlic and saute another minute or until onions are soft.
Add the ground pork to the skillet and season with salt. Cook while crumbling for about 3 minutes or until the pork is no longer pink.
Add the mushrooms and cook while stirring often for about 2 minutes or until mushrooms are starting to soften.
Add the cream cheese and stir well to incorporate. Add the Asiago and stir well. Once the cheese is melted, add the broth. Cook for 3 minutes or until mushrooms are soft.