To make the porcini-chipotle rub, combine the first 10 ingredients in a spice mill and grind to a coarse powder. Rub the tri-tip roast with the olive oil, liberally coat with the spice mixture, and ...

Although slow-cooking a tri-tip roast wrapped in foil is typically done in the oven, you can just as easily slow-cook it on your grill, ideal on a hot summer day. Tri-tip is a tender, boneless roast, ...