Heat a fry pan over medium high heat until hot. Add oil. When oil is hot, add the Mahi Mahi filets and sear about 2 minuted per side.
In the meantime in a small saucepan, combine the honey mustard, the Dijon, drained capers and a generous sprinkle of dried tarragon. Heat on low until warmed and combined.
To serve, place filets on a warm plate and drizzle with the honey mustard sauce. Serve with your favorite sides.