Preheat your oven to 400°F (200°C).

In a mixing bowl, whisk together low-sodium soy sauce, honey, grated ginger, and lemon juice until combined.

Place the cod fillets in a shallow dish and pour half of the marinade over them. Marinate for 15-30 minutes.

Line a baking sheet with parchment paper or grease it to prevent sticking.

Transfer the marinated cod fillets to the baking sheet and brush with remaining marinade.

Bake in the preheated oven for 12-15 minutes until fish flakes easily and is opaque.

Toast sesame seeds in a skillet over medium heat until golden, about 3-4 minutes, if desired.

Once cooked, plate the cod and sprinkle with chopped green onions and toasted sesame seeds.