Cut 1 ½ pounds flank steak into thin strips. In a ziplock bag, add flank steak pieces and ¼ cup cornstarch. Shake to coat.
In a medium-sized bowl, add 2 tablespoons olive oil, 1 teaspoon garlic, ¾ cup soy sauce, ¾ cup water, and ¾ cup brown sugar. Whisk to combine and add to the slow cooker.
Add 1 cup carrots, and coated flank steak to the slow cooker and stir until coated in the sauce.
Cover and cook on high for 2-3 hours or on low for 4-5 hours.
Serve over rice and garnish with green onions and sesame seeds.
