Easy Vegan Mushroom Noodle Soup

Name: Easy Vegan Mushroom Noodle Soup
Ingredients: 16 ounces noodles of your choice (soba, udon, or chow mein); 1 tablespoon neutral cooking oil; 2 yellow onions (peeled and thinly sliced); 5 cloves garlic (peeled and minced); 2 tablespoons ginger (peeled and freshly minced ); 8 ounces mushrooms (cremini, shiitake, or a mix) (sliced); 1 teaspoon sesame oil; 6 cups vegetable stock; 2 tablespoons Shaoxing cooking wine ((omit, if you can't find it)); 1 tablespoon soy sauce (plus more, if desired); 1 heaping tablespoon sambal oolek; 6 scallions (trimmed and minced, divided); 5 ounces baby spinach; Salt and pepper to taste; Microgreens, cilantro, or bean sprouts (for garnish); 1/3 cup neutral cooking oil; 2'' piece of ginger (peeled and sliced); 2 shallots, peeled and quartered