Help! Frozen straight to oven?

[Castlelough]

Hi, hoping somebody can advise quickly!

I have a LeCreuset oven dish that is also freezer safe. A few weeks ago I made a mince base for cottage pie and froze it in the dish. I want to put mash on top now and cook it for dinner.

Can I put mash on top of the frozen base and bung it in the
oven? And how long should I cook for at what temp?

Put it in the oven at 200 while you cook the potatoes, then once mash is ready pile it on, then 30 minutes at 200.

Allow the dish to warm a little at room temp. Thermal shock could make it crack if it goes straight from freezer to oven.

Thanks ladies. It came out beautifully! :-)