Preheat your oven to 400°F (200°C).

In a large skillet over medium heat, heat 1 tablespoon of olive oil. Sauté minced garlic for one minute, then add fresh spinach and cook until wilted (about three minutes). Remove from heat.

In a large bowl, combine cubed sweet potatoes with sautéed spinach, drizzle with remaining olive oil, season with salt and pepper, and mix well.

Transfer the mixture to a greased baking dish and sprinkle crumbled feta cheese on top.

Bake in the preheated oven for 30-35 minutes or until sweet potatoes are tender when pierced with a fork.