In a medium pot, heat oil on medium-low heat. Add red peppers and sauté until soft, about 4 minutes.
Add scallion whites, ¼ cup cilantro, garlic and red pepper flakes, cook 1 minute.
Add tomatoes, coconut milk and ½ teaspoon salt, increase heat and bring to a boil, cover and simmer on low about 10 minutes to let the flavors blend and to thicken the sauce.
Add shrimp and cook 5 to 6 minutes, until opaque and cooked through.
Add lime juice.
To serve, divide equally among 4 bowls, about 1 ¼ cups then top with scallions and cilantro.
