3 pounds bone-in beef short ribs
to taste Kosher salt and freshly ground pepper
2 tablespoons olive or vegetable oil
1.5 cups large carrot, chopped
2 large yellow onions, chopped
1 large leek, chopped optional
8 garlic cloves, smashed and peeled
1 tablespoon tomato paste
1 cup red wine any variety, but ideally a dry one
8 cups beef broth or stock
6 tablespoons unsalted butter
2.5 to 2.75 pounds yellow onions, peeled and thinly sliced
6 to 8 thick slices sourdough or country bread one per bowl
1 small garlic clove, peeled
1 cup gruyere cheese coarsely grated
to taste chopped fresh chives