Optional: 1-2 cups chopped broccolinialternatively you can simply roast the broccolini separately and serve as a side dish - regular broccoli work just fine
Instructions
Season chicken with salt and pepper.
In large cast iron skillet (I would recommend a 12 inch skillet/2 inches deep), heat to medium high heat and add ghee, allowing it to melt.
Sear chicken on each side, 3-4 minutes.
While chicken is cooking, combine coconut milk, chicken broth, dijon mustard, lemon juice and tarragon in medium mixing bowl; whisk to combine.
Pour mustard mixture around chicken and bring to simmer.
Let simmer, uncovered, for 10 minutes, flipping chicken halfway through.
Remove chicken and place on plate, setting aside.
Add arrowroot to pan and whisk to fully combine.
Add potatoes to pan and then nestle chicken.
Allow it to simmer for 20 minutes, uncovered, using a small whisk to continue to mix the sauce around the chicken, intermittently.
If adding broccolini, add with approx. 5-7 minutes left to simmer and then cover to let broccolini steam.
Taste and add salt, pepper or additional lemon juice, as desired.