Preheat the oven to 150°C.
Heat the oil in a large casserole dish set over a moderate heat until hot. Season the diced lamb and sear in batches until golden brown in colour all over. Remove from the dish and transfer to a colander sat on top of a bowl. Deglaze the base of the dish with the white wine and let it evaporate away almost entirely.
Add the lamb back to the dish along with the bay leaf and thyme. Cover with the stock and bring to a simmer, then cover with a lid and transfer to the oven to finish cooking. Cook the lamb for 2 hours until tender and easily pulled apart between your fingers. Remove from the oven and set the dish over a very low heat.
Add the asparagus and green beans, then add the peas and broad beans after 2 minutes. Add the mangetout after a further minute, then adjust the seasoning. Remove from the heat and serve immediately.
Freezing and defrosting guidelines
Once the dish has cooled completely, transfer it to an airtight, freezer-safe container, seal and freeze for up to 1-3 months. To serve, defrost thoroughly in the fridge overnight before reheating. Loosely cover with foil and bake until dish is thoroughly heated through. Reheat until piping hot.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home.