For a spicier kick, add more crushed red pepper or a dash of chili garlic sauce to the sauce mixture. Feel free to substitute other vegetables such as bell peppers, carrots, or snow peas for the broccoli. If you prefer a sweeter sauce, adjust the amount of honey to your liking. Make sure you slice the beef thinly against the grain for maximum tenderness. To toast sesame seeds, place them in a dry skillet over medium heat and cook, stirring constantly, until golden brown and fragrant.