Make Ahead Tip: Cover and refrigerate stuffed peppers and balsamic syrup separately for up to 4 hours. Drizzle the peppers with the syrup just before serving.
Shopping tip: Look for red and/or green jarred mild (or sweet) cherry peppers near pickles and olives or at the “olive bar” in well-stocked supermarkets and specialty-food stores.
Note: Chunk light tuna, which comes from the smaller skipjack or yellowfin, has less mercury than canned white albacore tuna. The FDA/EPA advises that women who are or might become pregnant, nursing mothers and young children consume no more than 6 ounces of albacore a week; up to 12 ounces of canned light tuna is considered safe.
1/2 lean meat