Hear the name ravioli nudi—literally, naked ravioli—and you may envision little sauceless pasta packets, but in fact it's not the sauce that's missing, but the pasta itself. Ravioli filling, in this case spinach and ricotta, is simmered...
Tomatoes require a high-acid wine, while earthy spinach is best with one that has bright, uncomplicated fruit. Sounds like Barbera, but no oak please.