Broil peppers 4 in. from the heat until skins blister, about 5 minutes. With tongs, rotate peppers a quarter turn. Broil and rotate until all sides are blistered and blackened. Immediately place peppers in a bowl; cover and let stand for 15-20 minutes.
Meanwhile, in a salad bowl, combine the turkey, spinach, tomatoes, onions, feta cheese, pepperoncini, Romano cheese, garlic and seasonings.
Peel off and discard charred skin from peppers. Remove stems and seeds. Slice peppers; add to salad and toss to combine. Serve with vinaigrette. Yield: 6 servings.