Wash the pumpkin and cover with plastic wrap and cook in the microwave until softened. ＊Be careful not to heat it up too much. (reference: 8~10 mins in 700W)

Cut about 1/4 of the upper part of the pumpkin. Scoop out the seeds and scrape pumpkin meat from shell. (leave at least 1 cm of the shell)

Heat the butter in a pan over medium heat, stir fry onion, shimeji mushrooms, bacon until the onions are browned. Turn down the heat and add the flour and mix well. Pour the milk little by little to get the smooth sauce. Add the pumpkin meat, salt and pepper and cook until thickened.(adjust the thickness to your taste)

Pour the mixture into the pumpkin, sprinkle cheese and panko bread crumbs on top and bake in 200℃ oven for 20~25 mins or until heated thoroughly. (Cheese starts to brown and panko bread crumbs are golden)