Add oil to a medium saucepan & heat to medium-high.
Add onions & garlic, stirring occasionally for about 2-4 minutes & season with salt & pepper.
Add thyme leaves, scotch bonnet pepper & tomatoes to the pan & cook another 2 minutes.
Pour in vinegar, honey & brown sugar.
Reduce heat to medium & allow the mixture to reduce to a rolling boil & cook down for about 13-18 minutes or until the mixture has a syrupy consistency.
Turn off and set aside.
Blanch the ackee in salted boiling water for about 3 minutes & strain