Preheat oven to 375℉.
Mix all marinade ingredients together and marinate chicken for 5 minutes
Preheat large heavy skillet and add avocado oil. Once oil is hot, sear chicken breastson both sides for 2 minutes per side.
Add butter and sage leaves, then wait for the butter to turn brown.
Add chicken stock and place skillet in oven for 5-10 minutes, or until thermometer inserted into thickest part of chicken breast reads 165℉.
Remove skillet from oven. Set chicken breasts aside and put skillet on stovetop on medium heat.
Reduce liquid by half. Add lemon juice and simmer 1 more minute.
Pour over chicken breast and enjoy!