In a skillet, heat olive oil over medium heat. Add minced garlic and sauté for 1 minute.

Add chopped spinach and cook until wilted, about 2-3 minutes. Remove from heat.

In a mixing bowl, combine the cooked spinach, feta cheese, lemon juice, salt, and pepper.

Lay the salmon fillets skin-side down on a sheet of plastic wrap.

Spread the spinach and feta mixture evenly over each fillet.

Starting from one end, carefully roll the salmon fillet into a pinwheel shape, using the plastic wrap to help.

Wrap the pinwheels tightly in the plastic wrap and refrigerate for 15 minutes to firm up.

Preheat the oven to 375°F (190°C).

Remove the plastic wrap from the salmon pinwheels and place them in a baking dish.

Bake in the preheated oven for 15-20 minutes, or until the salmon is cooked through and flakes easily with a fork.

Remove from the oven and let rest for a few minutes before slicing into rounds.