Lamb shanks with white bean and rosemary tomato sauce

Ingredients

• 2 lamb shanks
• 1 tablespoon olive oil
• 1 onion, peeled and quartered
• 4 garlic cloves, roughly chopped
• 1/3 cup dry white wine or chicken stock
• 10 cherry tomatoes
• 3 x 5cm sprigs rosemary
• 2 bay leaves
• 1/2 teaspoon sea salt and decent grind of black pepper
• vegetable stock or water
• 1 x 390g tin cannellini beans, drained
• salad greens, if desired