In my oven, 230deg is just about maximum temperature; cooking anything that hot for 30 minutes will result in cinders. I take it your oven is calibrated in Fahrenheit?
I’m curious too — 230F seems low for that amount of time. I’ve cooked plenty of meat in a smoker at 200-250F, but it takes many hours. On the flip side I agree 450F (~230C) sounds a bit high, but not imo catastrophically so.
In my oven, 230deg is just about maximum temperature; cooking anything that hot for 30 minutes will result in cinders. I take it your oven is calibrated in Fahrenheit?