Turn grill on high and allow to heat up for 15 to 20 minutes. Rub the roast with oil. When grill is heat, place the roast over the direct heat and sear each side for 4 to 5 minutes. Once seared, move to an area of indirect heat by leaving one side on medium-high heat and turning off the other side on a gas grill. Jan 30, - Well, it wasn't long before I got hooked on cooking over live fire. I went to the store yesterday and ended up buying a bottom round roast I have slow roasted the meat on your grill to about degrees (wrapped in foil) and.