Clean up the duck breasts(especially from the sinews on the meat side. Score the skin but be careful not to pierce the meat
Marinate it with salt and pepper and let it rest to get to a room temperature
Turn on the oven at 200 degrees celcius. If you do not have an oven safe pan, then place the oven dish in the oven to heat up as well
Place the duck breasts skin side down in a cold pan and then on medium heat. We do not need to add oil to the pan as the duck fat will take care of that.
let it sear in medium heat till the fat is rendered. In a normal sized duck breast, it should take you 10-15 minutes or so.
Flip it and sear the meat side as well, just a couple of minutes
Put it in the oven and bake for 10-20 minutes where 10 is pink in the middle and 20 is medium well depending on your preference
while the duck is cooking, in a pan add the orange juice, the zest and the sugar. Bring everything to simmer and reduce to half
If you want to add a bit of heat, add some pepper flakes to it
in a glass, mix the cornstarch with equal parts water. Throw this in the sauce and mix till everything is incorporated.
Taste the sauce, add salt and pepper to adjust the taste profile
Now that the duck is ready, let it rest for a couple of minutes before cutting it.
I would recommend serving it with the sauce on the side