1 pinch adobo seasoning (such as Goya®), or more to taste
Instructions
Coat the inside of a slow cooker with about 1 tablespoon oil.
Heat remaining oil in a large skillet over medium-high heat. Add roast and sear until browned, about 5 minutes per side. Cook and stir onion in the hot skillet during the last 5 minutes. Transfer roast to the slow cooker, reserving onion in the skillet.
Pour water into the skillet. Add bouillon, garlic, and adobo seasoning; cook and stir until onion is tender, about 5 minutes. Pour mixture over roast.
Cover and cook on High until roast is firm and reddish-pink in the center, about 4 hours. An instant-read thermometer inserted into the center should read 140 degrees F (54 degrees C) for medium.