Hi - we encountered this on our trip last week. The choice of apps, entrees and desserts is limited, but 2 in our party (of 10) chose it.
One got the ravioli and the other had the prime rib sandwich as entrees and both got the cheddar cheese soup as app (which was a huge bowl). For dessert one got the sorbet, and one got the mousse.
Sorry I don't remember all the options, and yes, it was $29.99 or 1 TS credit.
Milkshakes/smoothies were also included on the DDP.