Preheat oven to 375 degrees F.
Place a pot of water on to boil for spaghetti. When it comes to a boil, salt the water and add pasta to cook to al dente. Heads up: reserve 1/2 cup cooking water just before draining.
Place pork in a mixing bowl. Add the egg to the bowl. Place rice cereal in food processor and pulse into a bread crumb like consistency. Add cereal crumbs to bowl.
Add salt, pepper, five-spice powder, 2 chopped scallions and 2 tablespoons soy sauce. Mix the meat balls thoroughly. Form 1 1/2-inch balls and coat with 1 tablespoon oil, scatter onto a baking sheet and roast 15 minutes.
When the meatballs are close to done and the pasta is in, heat a large skillet over high heat with enough vegetable oil to coat the bottom of the skillet, a couple of tablespoons. Add the snow peas, red pepper, remaining cut scallions, ginger and garlic, stir-fry 2 minutes add spinach and wilt, 1 minute. Add the remaining soy sauce, about 1/3 cup, and the sesame oil then drain, add in pasta cooking water and toss to combine so pasta can soak up sauce, about 1 minute. Garnish with sesame seeds and top with lots of meatballs.