- Add liquid to drip tray and preheat Kenyon Grill to medium-high. Toss sweet potato with 1 tbsp olive oil, salt and pepper; grill for 3 to 5 minutes per side or until tender.
- Spread 4 slices of bread with mustard; sprinkle with some of the Cheddar, then layer apple slices over top. Sprinkle with some more of the Cheddar, then layer sweet potato over top; sprinkle with remaining Cheddar. Cap with remaining slices of bread.
- Brush outsides of sandwiches with remaining olive oil. Grill for about 3 minutes per side, flattening with spatula, until bread is nicely grilled and cheese is melted.
- tip: For a boldly flavored grilled cheese, substitute crumbled blue cheese for the Cheddar cheese.