Fill a large pot with water. Set Sous Vide in the pot and set temperature to 144 degrees.
While water is coming up to temperature prepare chops.
Heat oil in a heavy bottomed skillet.
Season chops with salt and pepper. Sear chops until browned on both sides. Remove from heat and allow chops to cool slightly.
Using a morat & pestle, create a paste with rosemary sprigs, minced garlic, salt & pepper.
Season chops with with herb/spice paste.
Place seasoned chops in a gallon sized ziplock bag
Add a pats of butter to each chop.
Seal bag, squeezing out excess air.
When water temperature reaches 144 degrees, submerge bag in the pot of water, and cook for 90 minutes.
To finish chops, heat 2 tablespoons butter in a large skillet.
Pat chops lightly with a paper towel to dry them.
Sear chops a second time for 1-2 minutes per side; pour juices from ziplock bag into the skillet, spooning butter and juices onto the chops as they cook.
Remove chops from the pan and slice to serve.