Boil water in a large pot, add 2 tsp salt, and cook spaghetti according to package instructions.

Heat 2 tbsp olive oil in a pan over medium heat. Add minced garlic and sauté until fragrant.

Add the salmon fillet to the pan and cook until fully cooked. Remove and flake into small pieces.

Add spinach to the pan and sauté until wilted.

Combine cooked spaghetti, salmon, and spinach in the pan. Add soy sauce, salt, pepper, and coarse black pepper. Mix well.