01 -
Sprinkle garlic powder over the beef sirloin strips.
02 -
Heat vegetable oil in a skillet over medium heat and sear the beef strips for about 5 minutes per side until browned.
03 -
Transfer the browned beef to the crock pot.
04 -
Dissolve the beef bouillon cube in hot water, then stir in cornstarch until smooth.
05 -
Pour the bouillon mixture over the beef in the crock pot. Add chopped onions, green bell peppers, stewed tomatoes (with liquid), soy sauce, sugar, and salt.
06 -
Cover and cook on High for 3 to 4 hours, or on Low for 6 to 8 hours, until the beef is tender.
07 -
Serve hot over rice or mashed potatoes.