Chop the red onion into small pieces.
Rinse and drain the black beans.
Mix the black beans, chopped onion, and lime juice together with some chopped cilantro add salt and pepper to taste and set aside. Allow to set for at least an hour so the flavors can develop.
Slice the mango into bite-sized pieces.
Mix the mango and tuna together.
Spread a layer of tortilla chips on the plates.
Spread the mango and tuna mixture in a circle over the chips.
Place a smaller circle of the bean and onion mixture inside the previous circle.
Place extra chips around the outside to simulate petals.
Note - This recipe should be adjusted to suit your personal taste. Don't like cilantro? Leave it out! Like a little kick? Add in some jalapeno pepper. Make it your own and enjoy!!