Layer the potatoes, okra and red bell peppers in slow cooker, potatoes on the bottom.
Set a skillet over medium heat. Add the oil and sauté the onions, garlic and ginger for 4-6 minutes, until soft. Remove from heat, and stir in spices and liquids.
Pour the onion mixture over ingredients in crock pot. Cook on high for 2 1/2 hours. Check the potatoes. If a fork is easily inserted into the potatoes, it is done. If not, cook another 1/2 hour and test again.
When the potatoes and done, gently stir together and taste the sauce. Adjust seasoning if desired. Serve over rice or with roti. Garnish with cilantro, chiles and bell peppers.