Chiles rellenosmexican-style stuffed and fried peppers in a roasted-tomato salsawas one of the first dishes i learned how to cook, using my dad's method. It mostly involved cans. Both my recipe and my technique have improved since those early days: i've experimented with various chili-roasting methods and dozens of batter recipes and techniques, and i've finally nailed that salsa. Here's what i've learned.