Preheat oven to 425 degrees F (220 degrees C).
In a small bowl, stir together the Olive Oil (3 tablespoon), Smoked Paprika (1 teaspoon), Cayenne Pepper (1/8 teaspoon), and Kosher Salt (1/2 teaspoon). Divide the Acorn Squash (3) slices and the oil mixture between 2 large rimmed baking sheets, tossing to coat. Arrange in a single layer without any overlaps.
Bake for 30 to 35 minutes or until tender with caramelized edges, switching racks halfway through. Transfer the roasted squash to a serving platter; sprinkle with Sage Leaves (6) and Crumbled Feta Cheese (1/2 cup). If desired, garnish with additional fresh sage leaves. Serve immediately and enjoy!