In Multipurpose Steamer, place rice, 2 cups water and broth mix; cover. Microwave 6 min, then set aside in a separate bowl.
In Multipurpose Steamer, place seasoning, meat substitute, peppers, mangoes, remaining 1 tbsp water, sesame oil, and soy sauce. Gently mix to combine. Microwave, 6 min.
Meanwhile, cut lettuce into four wedges, remove stem ends and gently peel the wedge leaves off two at a time to create strong, sturdy, crunchy boats for your filling.
Layer rice, then protein mixture on lettuce. Top with extra toppings, if desired.