Making roasting veggies naturally juicier/with more sauce

[Owlie]

Apple cider sounds good. Maybe I might put in some balsamic vinegar midway during the roasting time.

Cubes were that size. Or smaller. Oven at 350 degrees F.

I think that's your problem. You want larger cubes because they have less surface area to pull moisture from, and a higher oven temp. If you go lower they'll have to sit in the oven longer. Add a little bit more oil too. Just coat lightly.

Also, if you do the apple cider route, add it in the last 15 minutes or so, or reduce it on the stove a bit first.