Beef tri-tip, a cut that's seen a recent surge in popularity, can make a delicious one-pot meal for busy home cooks. While the most popular way to cook tri-tip is on the grill, this cut also fares well with slow-cooking methods like braising and roasting. In fact, a delicious tri-tip can be made with a quick sear on your stovetop and a long, low-heat braise in your crock pot.
Rub the steak on all sides with salt and pepper.
Add enough cooking oil to your frying pan to thoroughly coat the bottom.
Heat the pan on high until the cooking oil just begins to smoke.
Carefully place the steak into the hot oil and sear it on all sides, until the entire exterior is browned. Remove the steak from the pan onto a platter and set aside.
Add the mirepoix to the hot oil and sauté it until it's slightly browned and translucent. Transfer the vegetables to the crock pot. Lay the steak on top of the vegetables and pour in any juices remaining on the platter.
Deglaze the hot pan with beef or veal stock and red wine, if you like, scraping up any browned bits from the bottom of the pan. Reduce heat to medium-high, and whisk the bits into the liquid until the sauce is smooth and partly reduced, about 5 minutes.
Pour all of the pan sauce into the crock pot over the steak and add a bouquet garni -- a bundle of fresh herbs including thyme, bay leaf and other fresh savory herbs. If you do not have fresh herbs available, you can add dried herbs to a tea ball and set this inside the slow cooker.
Set the slow cooker to high -- or 300 degrees Fahrenheit -- and cook for 2 1/2 to 4 hours until the tri-tip can be easily pierced and slightly pulled apart with a fork.
Remove the tri-tip from the crock pot onto a warmed platter and tent it with aluminum foil. Allow it to rest for at least 15 minutes before slicing.
Slice the steak against the grain, and serve it topped with juices from the platter.