Makes about 34 sandwiches.
1 loaf of cumin quick bread
Make chicken salad:
In a large bowl whisk together the lime juice, the salt, the chili powder, the coriander, the mint, and the sugar, stir in the chicken, the shallot, and the scallion, and stir in the mayonnaise. (The chicken salad may be made 1 day in advance and kept overed and chilled.)
Cut the bread into 1/3-inch-thick slices, spread each of half the slices with a scant 2 tablespoons of the chicken salad, and top the chicken salad with the remaining slices. Cut each sandwich in half. Spread a thin layer of the mayonnaise on one of the edges of each sandwich and dip it in the parsley.