In a large skillet or saucepan, heat the vegetable oil over medium heat.
Add the chopped onions and garlic to the skillet. Cook until the onions are translucent and soft, about 5 minutes.
Stir in the chopped tomato, red and green bell peppers, and minced ginger. Cook for another 5 minutes until the vegetables start to soften.
Add the tomato paste, ground turmeric, paprika, ground cumin, dried thyme, ground coriander, and chili powder (if using). Stir well to combine.
Pour in the water or vegetable broth and bring to a simmer. Let the mixture cook for about 10 minutes, allowing the flavors to meld together and the sauce to thicken slightly.
Stir in the cooked meat and continue to simmer for another 5-10 minutes, until the meat is heated through and coated with the sauce.
Season the Rougaille with salt and pepper to taste. Garnish with freshly chopped parsley or cilantro.
Enjoy your meal!