There are a bunch of great dining choices in Pucón. Pizzeria Cala is awesome. Naukana is special. Sabores de Chile is great for true Chilean dishes. But Trawen is the place I have to visit every time I go to Pucón, which is a lot.
At some point you're going to get hungry on your trip to Chile. If you're in Pucón and need a safe bet, Trawen is your place.