For Relish: STIR pineapple tidbits, red pepper, red onion, marmalade, lime juice, cilantro and chipotle powder in medium bowl until combined. Place in strainer to drain excess liquid.
COMBINE sweet potatoes, peanut butter, cumin and salt and pepper to taste in medium bowl until blended.
PLACE a lettuce leaf at both sides at short end of flatbread. Spread 1/3 cup sweet potato mixture between lettuce leaves over 1/4 of flatbread. Top with 1/2 cup Chipotle Pineapple Relish. Starting at filling side, roll-up wrap into cylinder. Cut in half. Serve immediately.
TIP:
To cook sweet potatoes: Pierce skin a few times with fork. Place on paper towel on microwave-safe plate. Microwave on HIGH 4 to 5 minutes or until soft. Turn over halfway through cooking time. When cool enough to handle, remove peel. Mash until smooth.