First cook the chorizzo in a pan for a few minutes. Chorizzo itself has a lot of fat and you will not need extra oil. Keep mixing so that lumps are not formed.
Remote the chorizzo and in the same pan heat some olive oil for the next step.
Add mustard seeds, curry leaves, minced garlic and onions and saute. At this point Add salt and pepper according to taste.
Once the onion caramalizes, add the wine and bring it to a boil.
Add the clams and cover it to let the clams cook.
The clams will open when cooked. After that take the clams out and keep it on a baking tray.
In the same pan add butter balsamic vinegar to the remaining ingredients and reduce the sauce.
Put some of the reduced sauce in each of the clams along with some chorizzo, bread crumbs and cilantro.
Bake the clams for 2 minutes at 400 F and broil for 30 sec - 1 min untill the breadcrumbs turn golden.
Serve with lime juice squeezed over them for a delicious appetizer.