Heat both oils in a tagine over medium heat, add the onion and sauté until translucent. Add the chicken and cook for 5 minutes. Stir frequently.
Add the sliced carrot and bell pepper to the tagine and stir briefly. Cook over medium heat for 10 minutes.
Add the tomatoes and potatoes with the spices, crumble the stock cubes and spoon the vegetables and chicken into the tagine. Place the chicken on top of the vegetables and potatoes.
Add the boiled water and cover the tagine. Let it simmer for 20 minutes, add the peas and broad beans for the last 10 minutes.
Chop the coriander, add it to the dish and simmer for another 5 minutes. Garnish with olives, serve with bread and enjoy!