Combine the sauce ingredients in a small dish and set aside.
Melt about 1/4 cup lard in a large wok or other large frying pan. Turn the heat to high, and add the beef, pork, and garlic. Season the meat with seasoning salt. Cook the meat and garlic using a lifting and stirring action for about 5 minutes, or until the meat is no longer red.
Add the carrots and continue to cook (use the same lifting and stirring action throughout the recipe) for about 2 minutes.
Add the scallops, celery, and jicama and cook for about 2 minutes. Add the bean sprouts, snow peas, and cabbage. Cook for about 3 minutes.
Stir in the shrimp and the sauce. Season it to taste with additional seasoning salt and lemon pepper. Transfer the stir-fry to a large serving dish and garnish with the sesame seeds.