Heat olive oil in a skillet over medium-high heat.
Sear the steak bites until browned on all sides.
Fill the Slow Cooker
Transfer the seared steak into the slow cooker.
Add the butter, garlic, paprika, Italian seasoning, soy sauce, Worcestershire sauce and the broth to the slow cooker, and stir to mix.
Cook Until Tender
Cover and cook on low for 4 to 6 hours or until the steak is tender.
Thicken the Sauce
Stir the cornstarch with a Tablespoon of water to make a slurry.
Stir the cornstarch slurry in during the last 15 to 20 minutes of cooking.
If it’s still not thick enough, use a bit more cornstarch slurry, adding it gradually and letting it cook until the sauce looks glossy and thick enough.
Serve and Enjoy
Let the dish cool for 5 minutes, then serve hot, garnished with freshly chopped parsley.
Notes
Dry the steak well: Patting the meat dry helps it brown instead of steam. Avoid crowding the pan: Brown the steak in batches so each piece gets good color. Taste at the end: Adjust salt once the sauce has reduced and concentrated. Watch the thickness: Add a little more broth if the gravy thickens too much.