I whisk garlic, honey, ketchup, soy sauce, and oregano in a bowl until smooth. This ensures the flavors meld well before they hit the meat.
In a hot skillet with sesame oil, I sear the cubed beef in batches, just enough to brown all sides. The goal is flavor, not full cooking.
I transfer the seared beef into the slow cooker, pour over the sauce, and stir so all pieces are coated.
I cover the slow cooker and let it cook for 4–6 hours on LOW. The low heat avoids burning the sugars, and allows the beef to become very tender.
About 15 minutes before it is done, I test the sauce. If it’s too thin, I stir together cornstarch and water (slurry) and pour it in, then let it finish cooking. Once done, I serve garnished.