In a medium bowl combine the cut mango, cut avocado, diced peppers, cilantro, diced cucumber, salt, and lime juice then set aside.
Dice tuna into ½-inches pieces.
In a food ring mold placed in the center of a plate, begin building the tower layers by placing approximately 3-4 tablespoons of the mango avocado mixture into the ring mold and gently press down. The layer should be approximately 1-inch thick.
Place half the crab into the ring mold on top of the mango avocado layer and gently press down.
Place half the ahi tuna into the ring mold on top of the crab layer and gently press down.
Carefully remove the ring mold and top the tower with the black and white sesame seeds and microgreens.
Repeat for the second crab and tuna tower. Serve with fried wontons or tortilla chips.