For the salad: Cook the farro in the chicken stock for 20 to 30 minutes, then set aside to cool, 30 minutes.
Meanwhile, cook the pancetta in a pan until crispy, then set aside to cool, about 10 minutes.
Drain the apples from the acidulated water. Combine the farro, pancetta, apples, peas, shallots and garlic in a bowl. Add the cayenne pepper and some salt and pepper. Add the glaze and mix thoroughly.