How to Make It
Place oven rack in top third of oven. Preheat broiler to high.
Line a jelly-roll pan with foil. Cut off top third of each pepper (with stem); reserve 4 pepper tops. Remove seeds and membranes from peppers; discard. Arrange peppers on their sides on prepared pan; coat with cooking spray. Broil 8 minutes or until charred, turning after 4 minutes. Place 4 peppers, cut sides up, in an 8-inch square glass or ceramic baking dish. Wrap remaining 4 peppers in foil. Let stand 10 minutes; peel and discard skins. Reserve 4 peeled peppers.
Combine couscous, parsley, mint, 1 tablespoon oil, 1 tablespoon juice, 1/2 teaspoon honey, 1/2 teaspoon salt, cumin, crushed red pepper, and chicken in a medium bowl. Stir in goat cheese. Spoon 3/4 cup chicken mixture into each pepper in dish. Top peppers with reserved 4 pepper tops. Broil 3 minutes.
Combine remaining 1 tablespoon oil, remaining 1 tablespoon juice, remaining 1/2 teaspoon honey, and remaining 1/8 teaspoon salt in a bowl, stirring with a whisk. Add arugula; toss. Serve with stuffed peppers.