Preheat your oven to 475 degrees. In an oven-safe 10-inch skillet set over medium-high heat, melt the butter. Add the finely chopped celery, carrots, and a pinch of salt. Cook while stirring occasionally until they soften, which should take about 5 minutes. Add the chopped garlic and continue to cook, stirring occasionally, until it softens, around 1 minute. Now, introduce the cannellini beans, the Buffalo-style hot sauce, and several generous black pepper twists. Stir everything together to ensure it's well combined. Turn off the heat. Sprinkle the panko evenly over the top of the bean mixture, followed by the crumbled blue cheese.