Start the water bath by filling a large pot with water, place the sous vide wand in and set the temperature to 149°. Prepare the chicken while the water heats up.
Drizzle olive oil over the chicken breasts and season generously with salt and pepper.
Place 2 chicken breasts in each gallon size bag, place a sprig of rosemary and a lemon slice on each chicken breast. The chicken should not be overlapping.
Seal up the bags getting as much air as possible out.
Put the bags of chicken in the water bath, use the displacement method if there is still excess air in the bags. Cook 1 inch fresh chicken breasts for 45 minutes at 149°. See temperature guide in the notes for other options.
When the chicken is finished cooking sous vide, heat a skillet to very hot over medium high heat. Add a bit of olive oil or butter, then remove your chicken breasts from the bag, and place in the skillet (or grill). Cook 30 seconds, flip over and cook 30 seconds more.
Note: You can also use frozen meat, but it will take longer to cook. Use the same temperature guides above, but increase each cooking time by 25 minutes.
If the meat wants to float, weigh it down with a spoon or two. It should remain fully immersed during its cooking time.
As long as the meat is in a single layer with ample room for circulation, you can sous vide boneless chicken breasts in any amount you’d like.
Displacement method (for zip lock bags): leave a corner of the bag open, gently immerse the bag in the water, leaving the top out, the extra air in the bag will escape through the opening as you push the contents down. Once the air is out, finish sealing the bag.
Use chip clips to clip the bags to the side of your pan. This holds it in place and makes it easier to remove the bag from the water bath.