Step 1

In a colander set over a medium saucepan, drain the crushed pineapple. Set the pineapple aside.

Step 2

Add the water to the pineapple juice, then whisk in the cornstarch until dissolved and smooth.

Step 3

Add the brown sugar and crushed pineapple, then set the saucepan over medium heat.

Step 4

Bring the mixture to a boil, stirring frequently, for 2-3 minutes, until thickened.

Step 5

Remove the saucepan from the heat and stir in the butter and apple cider vinegar. Serve with ham.