Martha Rose Shulman's Chicken Fajitas

finely grated zest of

lightly toasted and ground

from canned chipotles in adobo

seeded and minced, optional

plus 2 tablespoons

large, minced or put through a press

large, or yellow, halved and sliced

or 1 red and 1 orange or yellow, seeded and sliced about 1/4 inch thick

seeded and sliced about 1/4 inch thick

or 2 serrano chiles, minced

chopped

large

or canola, or use olive oil

sliced crosswise

for serving

for sprinkling