Season the short ribs with salt and pepper.
Heat olive oil in a large skillet over medium-high heat. Once hot, add the short ribs and sear each side for 1 minute.
Transfer the seared meat into your Crockpot, then add the onions, garlic, and baby carrots.
Add the red wine, beef broth, tomato paste, and dried herbs. Cover and cook on low for 6 to 8 hours or until tender.
At the last hour, whisk one tablespoon of cornstarch with one tablespoon of cold water until lump-free.
Slowly stir the slurry into the broth. Cover and continue cooking until the gravy thickens.
Serve on top of mashed potatoes and garnish with herbs. Enjoy!