Preheat your oven to 375°F (190°C).
In a bowl, mix cream cheese, spinach, sun-dried tomatoes, feta cheese, and garlic until well combined.
Season the salmon fillets with salt and pepper.
Make a pocket in each salmon fillet by slicing it horizontally.
Stuff each fillet with the cream cheese mixture.
Heat olive oil in a skillet over medium heat.
Sear the stuffed salmon fillets for 3-4 minutes on each side.
Transfer the fillets to a baking dish.
Bake in the preheated oven for 15 minutes or until cooked through.
Garnish with fresh herbs before serving.