Cut pumpkin flesh into slices and arrange on a baking sheet. Drizzle with a bit of oil and season with salt and paprika. Bake for 40 minutes at 350 °F. Add the pumpkin to a blender with some butter and vinegar and pulse until the ingredients are well-combined. Arrange on toasted baguette rounds, add shaved Parmesan and garnish with a sage leaf and pine nuts.