Savory Ginger-Pepper Steak

Ingredients

• 2 tablespoons vegetable oil, divided
• 1 tablespoon freshly minced ginger
• 2 cups cooked white rice, for serving
• 2 tablespoons rice wine vinegar
• 1 tablespoon cornstarch
• 3 cloves garlic, minced
• 1/4 cup low-sodium soy sauce
• 4 teaspoons packed brown sugar
• 1 green bell pepper, thinly sliced
• 1 tablespoon sesame oil
• Kosher salt
• Freshly ground black pepper
• 1 red bell pepper, thinly sliced
• 1 lb flank steak, thinly sliced against the grain