Season the salmon with salt and pepper.
Heat oil in a pan over high heat, pan-fry salmon till cooked to your liking. I like my salmon pink in the middle, which usually takes about 2 to 3 minutes per side, depending on the thickness of the fish.
Transfer to plates.
Add onions into the same pan, stir-fry for a few minutes until onions are soft.
Mix together honey, lemon juice and water, stir into pan.
Lower heat and simmer for a few minutes until sauce thickens.
Stir in chopped mangoes.
Remove pan from heat and stir in mint.
Serve sauce on the side or on top of the salmon with a crisp lettuce salad.