Please start by patting the mahi mahi dry on a plate with paper towels. You want to get rid of excess moisture so the fish doesn’t release water.
In a large skillet, start by cooking the mahi mahi with 1 tablespoon of olive oil. Cook for 3-5 minutes on each side, depending on the thickness. Remove the mahi mahi and set on a plate.
In a large skillet, add the butter and wait until it melts. Place lemon slices on the pan, 1 minute on each side until the lemon caramelizes. With tongs, remove the lemon and place on an other separate plate. Add garlic and red pepper flakes and cook for 1-2 minutes. Add wine and cook for 2 minutes. Add the whole bottle of capers with the juice and add the mahi mahi back in the large pan. Cook for another 3 minutes, spooning sauce over fish. Remove from the pan and add salt and pepper as desired.
Garnish with parsley.