In a large skillet over medium heat, add enough oil to lightly coat the bottom of the pan, and cook the turkey for 8-10 minutes, or until cooked through. Transfer to a plate.
In the same skillet, add the onion and bell pepper, and cook for 2-3 minutes, or until slightly softened. Add in the garlic and ginger and cook until fragrant, about 1 minute.
Stir in curry paste, fish sauce and brown sugar and cook for 2-3 minutes
Add in coconut milk and bring to a simmer.
Return the turkey to the skillet, and stir in the pineapple
Simmer over medium heat for 10 minutes, until turkey is heated through and sauce has slightly thickened.
Serve with rice and sprinkle with Thai basil.