Step 1

Place beef, mushrooms, onion, garlic, soy sauce, brown sugar, water chestnuts and wine in slow cooker.

Step 2

Cover and cook on low 6-8 hours, high 4-6 hours.

Step 3

About 15-30 minutes before serving, add the peppers (see NOTES).

Step 4

If thickening is desired, mix cornstarch and water and stir into the slow cooker. Turn to high (if you cooked on low) and cook for 15 minutes.