For a twist on the classic stuffed mushrooms, try this recipe with spinach and feta cheese. The ingredients include fresh mushrooms, spinach, feta cheese, breadcrumbs, garlic, and olive oil. Start by sautéing the spinach with garlic and olive oil until wilted. In a bowl, mix together the sautéed spinach, crumbled feta cheese, breadcrumbs, and minced garlic. Stuff the mushroom caps with the mixture and bake until the mushrooms are tender and the filling is golden. These spinach and feta stuffed mushrooms are a flavorful and healthy appetizer option.