¼scotch bonnet pepper(deseeded and minced. This is an incredibly hot pepper, so if you don't want to use it, use a seeded jalapeno instead. It does add great flavor, though.)
In a bowl, toss the tempeh cubes with curry powder, black pepper, paprika, tamari and salt.
Heat 1 teaspoon of oil in a large saucepan or skillet. Add the tempeh cubes in a single layer and cook 2 minutes or until browned lightly on all sides.
Remove the tempeh and reserve.
In the same pot, add the remaining oil and saute the onions and garlic until they begin to soften, about 3-4 minutes.
Add the green pepper, scotch bonnet pepper, turmeric and thyme, and stir well to mix.
Add the cooked potatoes and half the coconut milk. Stir well to mix and bring to a boil. Lower heat to a simmer, cover, and let the stew cook for five minutes so the flavors merge.
Add the tempeh, mangoes, mango puree and the remaining coconut milk and heat until warmed through, but turn off the heat before the stew comes to a boil. Check salt and add more if needed.