To prepare a baked lentil and vegetable stew rice recipe, you will first need to gather your ingredients. Wash the lentils and cut them into bite-sized pieces. Cut the carrots in half and add them to the pot. Add the onion and garlic and cook over medium heat until the onions are translucent and the garlic is fragrant, about 5 minutes. Pour in the stock and bring to boil. Reduce the heat to medium low and simmer for 20 minutes, or until all of the liquid has been absorbed. Remove from heat and allow to cool for 10 minutes before serving.