Place rinsed and chopped Romain lettuce in large serving bowl.
To segment the oranges, cut about ½" off the top and bottom of the orange, then slice down the sides of the orange to cut off the orange peel.
Slice in between the natural orange segments, at an angle and clean orange slices should pop out.
Add orange slices to salad.
Slice up the avocado, and add to salad.
To make the dressing, combine all ingredients except the olive oil, salt and pepper in jar, tightly sealed tupperware container, or salad dressing jar and give it a good shake.
Remove lid and slowly add in the olive oil, whisking as you add it.
Finally, add salt and pepper, then give dressing another good whisk or shake (with the lid on!). Drizzle over salad, and enjoy!
Extra dressing will last in the refrigerator up to a week.