Instructions:

Slice the flank steak and seal it in a ziplock bag with corn starch. Shake well to ensure the beef strips are thoroughly coated.

In the slow cooker, combine olive oil, brown sugar, soy sauce, water, and minced garlic. Stir until the mixture blends harmoniously.

Immerse the beef strips into the mixture, spacing them out evenly.

Let it simmer on low heat for approximately 6 hours, ensuring the beef becomes melt-in-your-mouth tender and flavorful.

An hour and a half before completion, add the onions and peppers. They will infuse a fresh zing and richness to the concoction.

Allow everything to cook for the next 90 minutes, letting the vegetables soften and contribute their unique notes to the dish.