Make the dressing by pureeing the cilantro, olive oil, scallions and lime in the bowl of a food processor or blender until smooth. (Omit the olive oil on a WFPB diet). Season to taste with sea salt to your liking. It should be zesty and savory but not sour. Set aside.
Use a serrated knife to peel the blood oranges or whatever citrus you are using. Cut a thin slice of the peel from the bottom and the top of each fruit. Securely place it on a cutting board and cut the peel off following the curve of the orange. Make sure to remove the white pith but not the flesh.
Carefully slice the citrus crosswise into thin rounds and arrange them on a serving platter.
Slice the avocados crosswise and remove the pit. Cut a thin slice off of the bottom of each half and carefully remove the skin. Slice the avocado into slices the same size as your oranges. Place them on the serving platter together with the oranges and drizzle with the cilantro dressing all over the top.
Garnish with cilantro leaves and scallions just before serving.
Notes
To make this WFPB compliant replace the olive oil in the dressing with the juice from 1/2 lime or lemon.