Whisk together all dressing ingredients in a small bowl or measuring cup. Cover and refrigerate until ready to use.
Season salmon fillets with salt and a few grinds of black pepper.
Heat olive oil in a 12-inch, non-stick skillet over medium-high heat.
Add salmon and cook for 3 to 4 minutes, until pieces are lightly browned and crispy.
Carefully turn fillets, reduce heat to medium and continue to cook for 4 to 5 minutes, or until desired doneness. Remove salmon from heat.
While salmon is cooking, arrange greens, oranges, cucumbers, avocados and onions in 4 shallow salad (or pasta) bowls.
Top individual salads with cooked salmon and drizzle generously with dressing.
Top with sesame seeds and green onions, if using. Serve.
