A few weeks ago I faced an unusual culinary dilemma: What to do when friends drop by with two pounds of freshly picked chili peppers? On that afternoon I wasn’t up for stuffing, coating and frying the peppers for a fiery take on chilies rellenos. Nor did I anticipate making several gallons of spicy pico de gallo. Forget about hosting a scorching, week-long celebration of Mexican, South American, South Indian and Thai food. So, just what would I do with all these potent veggies? For centuries cooks have faced a similar quandary. In Mexico chilies have been cultivated since at least 3,500 B.C. Thanks to Portuguese and Spanish explorers who transported these plants around the globe, Indian and Southeast Asian chefs started dabbling with chilies in the 15th century. By the mid 16th century Europeans had incorporated them into their recipes. Although I normally associate chilies with heat, these early cooks added them for flavor. Chopped or ground up, dried or roasted, the peppers enhanced countless regional dishes. Ultimately, they became renowned not as a …