Chard- or Collard-Wrapped Polenta-Chile Tamale Packages From 'Heart of the Plate'

Ingredients (9)

• 2–3 tablespoons olive oil
• 1 cup finely minced onion
• 1/4 teaspoon ground cumin
• 1 medium Anaheim or poblano chili, seeded if desired, finely minced (heaping 1/2 cup)
• 1/2 teaspoon salt
• Black pepper
• 1 cup polenta (coarse cornmeal)
• 1/4 (packed) cup grated Jack cheese (2 ounces)
• 1 dozen large, perfect chard or collard green leaves (8–10 inches long)