Cook freekeh according to package instructions. Set aside.
Meanwhile, trim Brussels sprouts and shred them in a food processor.
Heat oil in a large skillet set over medium. Slice the shallots thinly and cook for 2 minutes, then add the shredded sprouts. Stir and cook, about five minutes.
Stir in the chicken, freekeh and 1/2 cup water. Add the lemon juice, balsamic, salt, and pepper, and cook for about 10 minutes, stirring to allow the flavors to mingle.