*bamboo skewers, soaked in water-24pcs 1. Blend 100ml of the evoo together with the chilies, garlic and vinegar into a paste. 2. Rub the paste onto the heart pieces and chill. Marinate for 30 minutes. 3. Insert the Teflon grill tray in the oven and set on dry heat at 280°C. 4. Mount the diced hearts on your skewers, about four or five per piece. 5. Reserve the marinade for basting. 6. Grill for 90 seconds on each side, basting as you quickly turn the skewers. 7. Meanwhile, also grill the corn and cooked potatoes, and baste as you go along. 8. Serve.