These Stuffed Sweet Potatoes with Spinach, Mushroom, and Feta are a wholesome, hearty, and flavor-packed vegetarian meal! Roasted sweet potatoes are filled with a savory sauté of garlicky mushrooms, wilted spinach, and crumbled feta for a perfect balance of sweet, salty, and umami. Ideal for a satisfying weeknight dinner, meal prep, or elegant side dish.