1Make a simple brine by adding salt, whole peppercorns, and garlic powder to a pot of water; bring to a boil.
2Pour the brine into a large container filled with additional water and stir in curing salt.
3Submerge chicken breasts in brine and refrigerate for a few hours.
4Rinse the chicken breasts after removing them from the refrigerator.
5Season both sides of the chicken breasts with your favorite seasoning mix.
6Vacuum seal two of the chicken breasts for sous vide cooking and oil and place the other two in an oven-safe dish for baking.
7Cook sous vide chicken at 145°F for about two hours, or until it reaches 160°F; bake the other breasts in the oven, using a thermometer to check for your desired temperature.
8Slice the chicken using a meat slicer or a sharp knife.