Preheat your oven to 375°F (190°C).

In a mixing bowl, combine the fresh spinach, cream cheese, shredded cheese, breadcrumbs, garlic powder, and salt. Mix until well-blended.

Create pockets in the center of each salmon filet using a sharp knife.

Stuff each salmon pocket generously with the spinach mixture.

Place stuffed filets in a greased baking dish, skin-side down, and bake for 25-30 minutes until the salmon flakes easily with a fork.

After baking, cool slightly and serve with a garnish of fresh herbs or lemon.