Step 1: In large bowl, stir the mustard with the green onions, barbecue sauce and soy sauce. Remove half of the mixture and reserve. Stir the beef, rice, egg, pickles, garlic, salt and pepper into the remaining mixture. Mix gently, using hands; form into six ¾ -inch (2 cm) thick patties. Set aside

Step 2: Grease grill; preheat to medium. Grill the burgers, turning once, for 12 to 14 minutes or until an instantread thermometer inserted sideways into the centre of the burger registers 160°F (71°C). Brush the burger with some of the reserved mustard mixture before removing from the grill

Step 3: Brush the pineapple with the remaining mustard mixture; grill until marked and tender. Stack the pineapple and lettuce on bottom buns; top with the burgers, roasted red peppers and remaining buns