Add 1-2 tbsp of olive oil to a Dutch oven and brown the lamb.
Drain the excess fat and transfer the lamb to a bowl.
Add another tbsp of olive oil to the same pan
Sauté the carrot, celery and onion slowly until soft
Add the garlic and sauté 1 minute
Add the lamb back to the pan and mix to combine.
Add the red wine and reduce by half.
Once reduced, add the stock and canned tomatoes.
Break up the tomatoes with a spoon and stir to combine.
Add the rosemary, bay leaf, salt, and pepper.
Let the ragu simmer slowly on a medium-low heat, uncovered for 2-3 hours.
If it starts to dry out add a little more water or stock.
Once ready, taste and add more salt as needed.
Bring a large pot of salted water to a boil and cook your pasta until al dente while keeping the ragu warm.
Once the pasta is cooked transfer it to the ragu and toss until completely combined in the sauce.
Serve in bowls topped with pecorino cheese.