If using a fresh orange, grate the zest with the medium to fine holes on a grater. Cut the orange in half and juice, using a hand juicer or simply squeezing by hand.* Pour 1/2 cup juice into blender.
Juice lemon (or lime) and scoop out the flesh of the avocado, then add to blender.
Add all remaining ingredients and blend until smooth. Adjust seasonings, to taste.
*Technique: How to Juice Lemons and Limes by Hand – Hold one half of a lemon in your hand. Squeeze it into the other hand, which is cupped with fingers slightly apart. The juice will run through your fingers, while you catch the seeds. To get a little more out of the lemon, poke the inside with a fork and twist first, then squeeze.
Serve on Kale Salad, any green salad, a wedge of cabbage, or grilled salmon.