Peel the dragon fruit and scoop the flesh into a blender. Add the hazelnuts, blue agave nectar and vanilla extract.
Zest half the navel orange and half the Key lime, leaving as much pith on the fruit as possible. Reserve the zest.
Cut the navel orange and Key lime in half, and squeeze their juices over a mesh strainer into the blender.
Blend until smooth.
Chill the mixture in the refrigerator for an hour.
Rim four margarita glasses with coarse sea salt. Pour the dragon fruit mixture into the glasses, then sprinkle the orange zest and Key lime zest over the top of each glass. Serve, and enjoy!
-Blend the mixture with ice to make frozen margaritas.
-For a mocktail, after step 5, add sparkling water and serve on the rocks.
-Replace the hazelnuts with 1 teaspoon freshly grated ginger.
-If dragon fruit is out of season, try blending 1 peeled and seeded pear, 1 cup of seedless watermelon and 1 peeled kiwi to attain a similar flavor profile and juice content. The rest of the ingredients and instructions remain the same.