I've found several mentions of potatoes when I went looking, but I was never able to find tomatoes.
Honestly, there's been literal millennia for crops to cross over, I don't see any reason to exclude tomatoes.
The first human colony in Lustria was Port Skeggi*, a Norscan settlement founded in 888IC. That was 1600 years ago, and it's still there to this day—and the Elves have probably been exploring and trading for even longer than that. So yeah, I wouldn't be surprised to see tomatoes in Old World Markets.
*The Amazons were the first humans in Lustria, arising in -8000IC, about ten thousand years ago.