Cook noodles according to package instructions; drain. In a large skillet or wok, heat 3 teaspoons vegetable oil over medium-high. Add garlic and ginger and cook, stirring, until fragrant and golden, about 1 minute. Add 1 teaspoon vegetable oil and mushrooms and cook, stirring constantly, until beginning to soften, 4 minutes. Add bell pepper and cook until crisp-tender, 3 minutes. Add snow peas and cook until crisp and bright green, 2 minutes. Add noodles, pork, and soy sauce and cook, stirring constantly, until noodles are coated with sauce and pork is warmed through, 2 minutes. Drizzle with sesame oil before serving.