I parboiled zucchini broccoli cauliflower carrots and butternut squash now I want to roast them in the oven what temperature and how long should I roast them since they're partially cooked?

2 Answers 2


We don't know how cooked your items are after the par boil. It also depends on the size of the items. So, we can't be very precise here. I would use high heat (400F or higher) because you probably want some color before the items overcook. As soon as they have some color, test for done-ness. Zucchini cooks much faster than the other items, so you might add that when the other items are almost complete.

  • 4
    It might even be worth putting them under the broiler to get the color on the outside without cooking the middle too much more
    – Joe
    Jan 27, 2023 at 15:21
  • ...yes...what@Joe says....
    – moscafj
    Jan 27, 2023 at 15:28

I would not par boil zucchini, they will be over cooked and mushy

par boil just enough that the vegetables are starting to be tender; stick a for in them.

Remove from the water and make sure you drain them completely, or as close to. Put them on a sheet pan and less the steam steam away.

Toss with olive oil and seasoning and put in an high temperature oven (400F+)

The high temperature is kinda required to remove as much humidity as quickly as possible so the vegetables can get some colors.

You have to keep an eye on them.

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