Sweet and Sour Pork

Name: Sweet and Sour Pork
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: Asian, Chinese
Ingredients: 16 oz pork tenderloin, in slices (1 in. x ½ in.); 1 oz mirin; 4 tsp soy sauce, divided; 1 tsp vegetable oil; white pepper, to taste; 2 tbsp cornstarch; 4 oz canned pineapple pieces, in juice, drained juice reserved; ½ oz vegetable oil; 1 garlic clove; ½ oz fresh ginger, peeled and sliced; 3 oz rice vinegar; 3 oz sugar; 1 oz ketchup; ½ tsp Worcestershire sauce; 4 oz red bell pepper, in pieces (1 in.); 4 oz yellow bell pepper, in pieces (1 in.); 4 oz onion, in pieces (1 in.); sesame seeds, to garnish; green onions, sliced, to taste, to garnish