In a big pot over medium-high heat, add a little oil and brown the turkey tails on all sides. It usually takes about 3-5 minutes per side. Depending on how big your pot is, you'll likely have to do this in two batches.
Add all the browned turkey tails back into the pot, turn the heat to low. Add the sliced ginger and smashed garlic cloves.
Then add the green beans, bay leaves, peppercorns, vinegar and soy sauce.
Then add enough water to cover the the turkey tails. Give it all a gentle mix. Put a lid on the pot and turn the heat up to high heat.
Bring everything to a boil. Then turn heat down to a simmer, and simmer for 1 hour until the turkey tails are nice and tender.
If there is a lot of liquid in the pot after 1 hour, just remove the lid and turn the heat up to high. Let cook for another 10 minutes until the liquid reduces.
Use tongs to remove the turkey tails to a shallow bowl. Put all the green beans on top and pour over the sauce/liquid/broth. Eat hot (with rice!) and enjoy ^_^