First Time Ever: Chicken Pot Pies

Believe it or not, until today, I never made chicken pot pies. I've eaten them but they were made by someone else. The closest thing of a chicken pot pie I made was this Rachael Ray recipe. Finally I decided to go for it after doing some Internet research and trying to figure out what to do with the remaining puff pastry dough. I decided to make them mini so that my household could have their own cups with the crust and veggies.

My filling was chicken, onion, potato, carrots, celery, corn, peas, dried tarragon, chicken broth, milk, flour, dijon mustard, and butter