Set a colander over a large bowl.  Cut fruit into the colander to drain the juices into the bowl.  The juices will be used for the vinaigrette.  OR use 1 cup prepared orange juice, if preferred.

With a paring knife, remove peel, pith, and outer membrane from oranges.  Remove orange sections with knife by cutting between each orange section and the attached membrane.  You will be cutting on each side of each section.  Cut each orange section in half, if desired.

Prepare pineapple by cutting away tough exterior and core.  Cut into bite-sized pieces.

In a blender, mix together the fruit juice, rice vinegar, sugar, and seasoning salt.

With blender on a medium or high speed, slowly drizzle in the olive or canola oil.

Pour the vinaigrette over the fruit and allow to sit for about 15 minutes, then serve fruit over choice of greens such as spinach, Romaine, or a mixture of baby lettuces/greens.  Spoon more vinaigrette over salad if desired.