Mix shrimp with olive oil and place on grill pan or broil for 2 minutes per side.
Prepare fettuccini to package directions, drain, and set aside while sauce is prepared.
Combine sweet potatoes, coconut milk, cilantro, red pepper flakes, and ground ginger into a food processor or blender.
Blend until mixture is completely smooth. Add additional red pepper or ground ginger depending on spice preferences.
Combine sauce, pasta and shrimp on a pan over medium heat and stir to combine until heated through, approximately 5 minutes.
Top with scallion slices and additional red pepper flakes (optional).