Drain golden caviar and stir together with wasabi paste; set aside.

Combine cubed mango and mayonnaise in a blender, and process until smooth.

Stir the blended mango mixture into the caviar mixture.

Combine cubed ahi tuna, finely chopped Maui or other sweet onion, soy sauce, Hawaiian salt or sea salt, ogo, sliced green onions, chili-garlic sauce, and dark sesame oil in a large bowl; toss gently to combine.

Spoon about 1 tablespoon of mango mayonnaise into each of 8 martini glasses.

Top each martini glass evenly with the ahi tuna mixture.

Spoon additional mango mayonnaise over each serving.

Garnish with banana leaf and orchid, if desired.