Fill sous vide container with water and set machine to 145° F
Season chicken breasts with salt and pepper.
Place lemon slices and herbs on top of each chicken breast.
Seal a vacuum seal bag on one side.
Carefully place chicken breasts inside bag and vacuum seal the bag.
Place vacuum sealed chicken in water and set timer for 1 hour. Be sure the bag stays submerged in water by placing a weight on it (like a small plate).
After 1 hour, heat skillet over medium high heat and add butter, oil and smashed garlic.
Remove chicken breasts from bag, pat dry with a paper towel, and sear in skillet, flipping once.
When chicken is nice and browned and has reached 165° F, remove and let kit rest for about 5 minutes.
Serve warm, whole or sliced... spooning pan juices over chicken.