For the Guava Glaze:
Combine all ingredients and simmer in a large saucepan for 2 hours at very low heat.
For the Pork Loin:
Season pork loin with Adobo and stuff with the garlic cloves. Bake in a preheated 350 degree oven for 18 minutes per pound. When meat is nearly fully cooked, baste with guava glaze and cook for another 5 to 10 minutes. Place on a serving platter.