Loofah (luffa) with ginkgo and mushrooms

Ingredients

• 2-3 thin slices of ginger;
• uffa, peeled and sliced into slightly thick chunks;
• oyster mushrooms (note: try other fresh mushrooms as a variation),
• roughly sliced; ready-to-use ginkgo (store-bought, usually in a sealed pack or can);
• 3-4 tablespoons water;
• drizzle of sesame oil;
• salt and white pepper to taste