Step 1: Prepare the Cod Fillets

1. Pat the cod fillets dry with paper towels to remove excess moisture. This will help the glaze adhere better and ensure even browning.
2. Season both sides of the fillets with salt and black pepper.

Step 2: Make the Ginger Soy Glaze

1. In a small saucepan over medium heat, combine the soy sauce, honey, grated ginger, minced garlic, rice vinegar, and sesame oil. Stir well to blend.
2. In a separate small bowl, mix the cornstarch and water to create a slurry. Slowly pour the slurry into the saucepan while stirring constantly.
3. Allow the glaze to simmer for 2-3 minutes, or until it thickens slightly and becomes glossy. Remove from heat and set aside.

Step 3: Sear the Cod

1. Heat olive oil or sesame oil in a large nonstick skillet over medium-high heat.
2. Place the cod fillets in the skillet and sear for 3-4 minutes on the first side without moving them. This helps develop a golden-brown crust.
3. Flip the fillets carefully using a spatula and cook for an additional 3-4 minutes on the other side, or until the cod is opaque and flakes easily with a fork.

Step 4: Glaze the Cod

1. Lower the heat to medium and spoon the ginger soy glaze generously over each cod fillet. Allow the glaze to bubble and coat the fish for 1-2 minutes.
2. Remove the cod fillets from the skillet and place them on serving plates. Drizzle any remaining glaze from the skillet over the top.

Step 5: Garnish and Serve

1. Garnish the cod fillets with sliced green onions and a sprinkle of sesame seeds, if desired.
2. Serve immediately over steamed jasmine rice, sautéed bok choy, or roasted broccoli for a complete, flavorful meal.