mom used to brown steak (t-bone or sirloin) and then put it in her Guardian roaster.  Not the way I like steak compared to grilling but was really tender and good.

I have a piece of sirloin that I wanted to try that with as it's toooooo cold to grill.  I seem to remember mom cooking it at low temperature for a longer time.  Something on the order of 180º.  If I put it in the oven at that temp how long would a 1.5 pound piece of steak take to cook/roast?

Or should I put it in at a higher temperature?