Heat the butter in a large saucepan and sauté the shallots and garlic until lightly browned
Add the carrots and cook 3 minutes, then remove to a bowl.
Add the lamb to the saucepan and brown the meat.
Add the mushrooms, stock, soy sauce and herbs.
Return the shallot mixture.
Bring to the boil then simmer for 1 ½ hours, stirring occasionally.
Stir in the chickpeas and olives and cook another 30 minutes.
Stir in the lemon zest and juice and parsley, then season.
For the mash, steam or boil the celeriac until you can insert a knife through it and drain in a colander. Put the pan back on the heat with the butter, olive oil and spring onions and sauté until sizzling. Return the celeriac and mash it, then season
For the pumpkin seeds, sauté over medium heat in the olive oil until they smell a little toasty