Step #3 In a 3- to 4-quart pan over high heat, bring about 2 quarts water to a boil.
Step #4 Add the shrimp, reduce heat to maintain a simmer, & cook this until shrimp are opaque but still moist-looking in center of thickest part (cut to test), 1 to 2 mins.
Step #5 Remove with a strainer or a slotted spoon & immerse in ice water until cool.
Step #6 Add scallops to simmering water & cook this until opaque but still moist-looking in the center (cut to test), 1 to 2 mins; lift out & immerse in ice water until cool.
Step #7 Drain shrimp & scallops.
Step #8 Cut each shrimp crosswise into thirds.
Step #9 Meanwhile, bell pepper, cilantro, lime juice, in a glass or ceramic bowl, mix coconut milk, chilies, ginger, & salt.
Step #10 Stir in shrimp & scallops.
Step #11 Cover up & chill at least 6 hrs or up to 1 day.
Step #12 Spoon into a large serving bowl or onto a rimmed platter.