1Heat oven to 400°F. In 15x10-inch pan, place tomatillos, onion and jalapeño. Brush with canola oil.
2Roast uncovered 25 to 30 minutes or until vegetables are lightly browned and softened.
3In food processor or blender, place tomatillos, onion, jalapeño and remaining ingredients. Cover; process, using on-and-off pulses, until mixture is chunky.
4Transfer relish to serving bowl or storage container. Serve at room temperature or chilled.