Braised Lamb Shanks With Caramelized Onions and Shallots

4 tablespoons olive oil 1 lb onion , sliced 5 large shallots , sliced 2 tablespoons fresh rosemary , chopped 6 lamb shanks all-purpose flour 2 1/2 cups dry[...]

1/4 cup olive oil , divided 2 lamb shanks (2 pounds total) 4 garlic cloves , thinly sliced 2 preserved lemons , thinly sliced 1 cup dry white wine 1 cup low[...]