I was in the Stella Ronda area earlier this year. Stayed in Canazei,
but couldn't really recommend it as a beginners spot.
Assuming your wife is not a total beginner then of the places I skied
then perhaps Corvara might fit the bill. We also did a day trip to
one of the many isolated - from the main stella ronda - areas around
Predazzo/Pampeago/Obereggen which might also fit the bill. Very
pretty and some tree level skiing.
However I'd tend to classify the area as being more of an intermediate
skiers playground - or those who like to go on longer treks. There's
not much in the way of difficult piste skiing. Pretty area though.
Rod