In a medium bowl, combine ¼ cup soy sauce, 2 tablespoons olive oil, 2 tablespoons honey, 2 tablespoons lemon juice, 3 minced garlic cloves, 1 teaspoon ground ginger, ½ teaspoon black pepper, and ½ teaspoon red pepper flakes. Whisk until smooth.

Place 4 salmon fillets in a shallow dish and pour the marinade over the salmon, turning to coat.

Cover the dish tightly and refrigerate for at least 30 minutes, up to 1 hour.

Preheat the grill or oven to 375°F (190°C), about 10 minutes before cooking.

Remove the salmon from the marinade and cook on the preheated grill or a lined baking sheet for 15-20 minutes, until flaky.

Transfer the salmon to a platter and let it rest for a few minutes before serving.