Heat oil in a cooking pot.
Saute ginger, fennel, and onion.
Once onion becomes translucent, pour water into the pot. Let boil. Cover and continue to boil in medium heat for 8 minutes.Note: This process will extract the flavor from the onion, fennel, and ginger.
Add mussels and clams. Continue to cook for 5 minutes.
Add spinach, red pepper flakes, and salt. Stir. Cook for 1 minute.
Transfer to a serving bowl.
Serve hot. Share and enjoy!