Bring water and butter to a simmer over high heat. Reduce heat to medium and stir in flour quickly, all at once. Stir until dough pulls away from sides of pan.
Remove from heat and cool slightly (about 5 or 6 minutes).
Add eggs one at a time mixing rapidly until each is combined into the dough.
Add chopped ham, shredded Parmesan cheese and chopped chives.
Drop by large tablespoons on parchment covered baking sheet.
Bake at 375 degrees for 15 minutes and for another 20 minutes at 350 degrees.
Let cool before filling.
For bacon cheese puff filling:
Mix all together and refrigerate until time to fill puffs. Cut top from each puff, toast, and fill. Replace top.
