In a skillet over medium heat, add 1 tablespoon of olive oil and sauté the minced garlic until fragrant, about 1 minute.
Add the chopped spinach to the skillet and cook until wilted, approximately 2-3 minutes. Remove from heat and let it cool slightly.
In a mixing bowl, combine the softened cream cheese, crumbled feta, grated Parmesan, lemon juice, oregano, and the sautéed spinach. Mix until smooth and well combined. Season with salt and pepper to taste.
Take each salmon fillet and, using a sharp knife, make a cut on the side of each fillet to create a pocket for the stuffing.
Generously fill each salmon pocket with the creamy spinach mixture, gently pressing to ensure it stays inside.
Heat the remaining tablespoon of olive oil in an oven-safe skillet over medium-high heat. Once hot, place the stuffed salmon fillets in the skillet, cooking for about 3-4 minutes on each side until golden brown.
Transfer the skillet to the preheated oven and bake for an additional 10-12 minutes, or until the salmon is cooked through and flakes easily with a fork.
Remove from the oven and let it rest for a few minutes before serving.
Notes
Serve on a white platter garnished with lemon wedges and fresh herbs.