Ahi Tuna Crudo and Blood Orange, Fennel, and Pear Salad
Combine the vinegar and sugar over medium-low heat. Stir until the sugar dissolves. Pour into a dish and add the red onion. Cover and refrigerate for at least 30 minutes.
Slice the ahi into ½-inch pieces and marinate in the olive oil.
In a small bowl, combine the fennel, pear, ¼ cup of the red onion pickle, blood orange, and some juice reserved from sectioning process; add the olive oil and fennel seeds. Season the salad with sea salt and pepper.
Arrange the tuna on a chilled plate. Top with the salad and sprinkle on the chives.