Don't know about this recipe, but I've used pure apple juice in place of white wine before, but that was in concert with tomatoes — if you want the slight vinegar taste, rather than a sweet tang, perhaps add a few
drops of white wine vinegar.
I've been making this nonstop for the last couple
of weeks: salad greens (not iceberg, ugh), chopped red onion, chunks
of extra ripe mango, shredded carrots, chopped avocado, sliced cucumbers and feta, drizzled with a bit
of a honey +
white wine vinegar with the tiniest
drop of sriracha and a healthy helping
of black pepper.