Combine the duck confit and duck parts with the hog belly and bacon.
Add the pistachios, duck fat, allspice, pepper, and nutmeg. When pressing your hand into the mixture, the duck fat should come up a bit between your fingers.
Add a few drops of water to the bottom off the terrine mold. Line it with plastic wrap lengthwise so that there is plastic draping over both ends of the mold. Fill the mold with water to help press the plastic into the contours of the mold, and press with your fingers. Pour out the water and pat the inside dry with paper towel.
Press half of the meat mixture into the mold.
Unroll inlay and press gently into the center of the terrine. You may have to trim the inlay to fit the mold.
Gently place more of the meat mixture on each side of the inlay, making sure the inlay does not become off-centered.
Add more meat on the top and press down gently onto the meat until the top is covered and smooth and compact.
Cover terrine and place in a warm water bath halfway up the sides of the mold. Bake at 300 degrees F for about 2 hours.
Remove the terrine form the hot water bath and let it cool slightly. Press terrine down and place in the refrigerator overnight.
When ready to serve use a serrated knife and gently cut terrine into slices ½ inch thick. Garnish with micro greens and sea salt if needed.