Finely chop the onion and garlic.
Heat a spoonful of oil in a large pan and gently sauté them until soft. Add the rosemary and stir for a minute. Stir in the tinned tomatoes and cook for 10 minutes.
Meanwhile, shred the lamb into bite-sized pieces. Add these to the tomato sauce.
Drain the chickpeas and slice the peppers into strips. Add these to the stew and cook for a few minutes. Season to taste.
When the stew is warmed through, remove the pan from the stove, and stir in the chopped herbs of your choice.
Serve with sides of your choice.