Combine the first six ingredients in a medium saucepan over medium heat. Bring to a boil then reduce heat and simmer for 5 minutes. Cool uncovered, then strain out the ginger, garlic, and tea.
Put your sea bass fillets in a storage bag or a covered container with 2 cups of the marinade. Reserve the remaining sauce. Let the fish have a nice soak in the marinade for 5 to 7 hours in the fridge. If the sauce doesn't completely cover the fish, be sure to turn the fillets a couple hours in so that all sides get marinated.
When you are ready to prepare the fish, preheat your oven to 425 degrees F. Arrange the fillets on a baking sheet. Bake the fish for 22 minutes or until the edges of the fillets are starting to turn brown.
Crank the oven up to a high broil and broil fish for 2 to 3 minutes or until you get some dark patches around the edge of the fillets. Just don't let them burn.
As your fish is baking, first start to reheat the reserved sauce on low then heat up a wok or large skillet with one tablespoon of vegetable oil over medium heat. Add the spinach, garlic and baby sweet corn, and a dash of salt and pepper to the pan. Saute the veggies just until the spinach is wilted, then arrange the spinach and corn on each of the four plates.
When the sea bass is done broiling, use a spatula to carefully lay the fillets over the spinach and baby corn on each plate. Split the remaining sauce and pour it over each of the fillets before serving.