From Dinners for Two by Sharon O'Connor; a collection of recipes from romantic country inns. Chinese black beans can be found in Asian markets, but it can be replaced with Chinese black bean sauce which is available in most grocery stores.
Spread a sheet of parchment paper on a flat working surface and brush the edges with oil. On one half of the sheet, place a portion of the cabbage in the center, place a fillet on top of the cabbage, and arrange the mushrooms around; fold the remaining half of the parchment over the fish, and secure by folding in the edges. Repeat with the other sheet of parchment.
Place the parchment packages on a baking sheet and bake just until the fish is cooked, 8 to 10 minutes. Remove from the oven and transfer to a plate.
In a saute pan or skillet, heat the olive oil and saute the shallots, garlic, ginger, and black beans for about 3 minutes.
Serve. Remove the fish from their parchment, transfer to dinner plates, and drizzle the sauteed mixture over. Garnish with green onions and cilantro.