Sauté onions and garlic in olive oil for a minute or two then add the sweet potatoes, carrots and bell pepper and stir it for about 5-6 minutes.
Reduce the heat to medium low, and add the remaining ingredients, stirring to combine well.
Simmer, partially covered and stirring occasionally. Cook for 20-25 minutes, until flavors are well mixed and vegetables are cooked.
Garnish with coriander and serve.