Stuffed bell peppers are a delicious and satisfying main part of a vegetarian meal (or pescatarian, in this case), accompanied by a salad and crusty bread, and makes a lovely presentation, especially when you use peppers in a variety of colors (green, yellow, orange, and red). Here the peppers are stuffed with a couscous filling that includes carrot, shallot, cilantro, and sardines, preferably the kind that are packed in a tomato sauce.