Marinade meat and seafood with a little salt, pepper, sugar and a dash of cooking wine. Set aside. In a bowl, mix all the seasoning ingredients for the Brown Sauce and set aside.
In a wok, heat 2 tablespoon oil to smoky hot, stir-fry onions and peppers until lightly charred, add in minced garlic, briskly stir-fry until fragrant, toss in the broccoli florets, carrots, and continue stir-frying for about 2 minutes, dash a little salt and pepper, mix well and dish up. Set aside.
Lightly clean up wok with damp paper towel. Heat up wok with remaining 1 tablespoon oil, stir-fry shrimp, lobster/crab meat for 1 minute, toss in sliced beef and pork/BBQ pork and continue to stir-fry for another 1 minute, or until lightly browned.
Toss in the mixed canned vegetables, stir well, add in the Brown Sauce seasoning, pour in the chicken broth and continue to stir-fry until vegetables are tender enough to your liking, meat and seafood is thoroughly cooked. Adjust salt, sugar, or other flavorings as per taste. Dish up and serve with hot steamed rice.