Pineapple glaze:
2 tablespoons unsalted butter
1 whole fresh pineapple, peeled and cubed
1 cup low-sodium soy sauce
1/2 cup dark rum
1/4 cup hoisin sauce
1/4 cup ketchup
3 tablespoons rice vinegar
1/4 cup brown sugar
1 fresh red chile, sliced thin
2 garlic cloves, smashed
1 (2-inch) piece fresh ginger, whacked open with the flat side of a knife
In a saucepan over medium heat melt the butter and add the pineapple chunks; saute for 3 minutes. Add the soy sauce, rum, hoisin sauce, ketchup, vinegar, brown sugar, chile, garlic, and ginger. Bring to a slow simmer and cook, stirring, until thickened, about 20 minutes. Pull out the ginger pieces. Pour the glaze into a blender and puree until smooth.
In the last 30 minutes of cooking, baste the pork with some of the glaze.
I hope this helps! I look forward to photos of your cook!