Yum! Enough said!
You can cook and dice up your chicken ahead of time. You only need 1 chicken breast, which yielded 1 1/2 cups for me. You could also use rotisserie chicken. I used a 1/2 tsp dry mustard instead of the dijon mustard. Follow the measurements because if you put in any extra veggies or chicken you will not able to fit it all in the pastry squares. This was fun and yummy and I will definitely make again, but to save time I might put the filling into a casserole dish and just cover with pastry. This would be much faster, you just won't have the cute pockets.