Add all of the ingredients to a blender and pulse until smooth. Refrigerate until ready to use.
Salad:
Trim lettuce leaves off the head. Rinse well and dry.
Remove and discard peel and white pith from citrus. Cut oranges and grapefruit crosswise into 1/4-inch-thick slices.
Toss the lettuce leaves, citrus, radishes, chives, and mint, with the vinaigrette and plate on large salad bowl. Finish with a sprinkle of poppy seeds, flaky salt and edible flowers (optional). Enjoy!