Braised Pork Ramen

Name: Braised Pork Ramen
Ingredients: 1 small onion, halved through the root; 1 tablespoon plus 2 teaspoons vegetable oil; 2 pounds boneless pork butt, cut in half; 1/2 cup soy sauce; 1/3 cup mirin; 6 scallions halved, plus sliced scallions for topping; 1 4-inch piece fresh ginger (unpeeled), thinly sliced and smashed; 10 cloves garlic (7 smashed, 3 minced); 2 1/2 pounds chicken wings, split; 4 slices thick-cut bacon (about 6 ounces); 4 dried shiitake mushrooms; Kosher salt; 3 large eggs; Mung bean sprouts, shredded nori, sliced radishes, toasted sesame seeds and/or shichmi togarashi (Japanese seasoning), for topping; 6 portions fresh or dried ramen noodles