Step 1

Preheat the oven to 350 degrees F (175 degrees C). Grease 4 muffin cups with butter (leave space in between the muffin cups).

Step 2

Cut puff pastry sheet into 4 squares and place into the greased muffin cups in such a way that the 4 corners are draping over the sides. Brush bottom and sides of the puff pastry with Dijon mustard.

Step 3

Cut each slice of bacon into 4 pieces and drape 3 bacon slices around the tops of the muffin holes.

Step 4

Break eggs individually into a small bowl without breaking the yolks and slide into the muffin cups.

Step 5

Bake in the preheated oven until puff pastry is lightly browned and eggs are set, 22 to 27 minutes.

Step 6

Remove from oven, season with salt and pepper, and sprinkle with chives.