In a large pot, drop in a bit of oil and saute the garlic then onions. Then add salt, peppercorns, and bay leaves. Saute for a couple minutes until the onion have turned a nice brown color.
Add the vinegar and brown sugar. Simmer this for a little bit until onions are soft, about 5-10 minutes.
After a few minutes, add the lechon sauce. Mix until well integrated and have a taste. Adjust to your liking. Simmer this for up to 10 minutes.
Once a simmer is reached, add in the turkey. Simmer this until the turkey is hot and ready to eat!
Serve with white rice or whatever you'd like and enjoy!