Preheat oven to 400 degrees F.
To a large skillet over medium-high heat, add vegan sausage and cook until browned and heated through.
Add garlic, mushrooms, salt, and black pepper. Continue cooking 8-10 minutes, until most of the liquid is evaporated.
Meanwhile, to a small bowl, add milk and 1 1/2 tablespoons melted butter and stir to combine.
Add cream cheese, parmesan, and milk/butter mixture. Bring to a low boil for 2-3 minutes.
Pour into a 1-quart ramekin dish.
In a small bowl, combine the remaining 2 tablespons butter, Panko beadcrumbs, and parsley. Spinkle evenly over dip mixture.
Bake 20 minutes, until bubbling and browned around the edges. After baking, allow to stand 10 minutes before serving warm.