In a skillet, heat sesame oil over medium heat. Add garlic and ginger, sautéing until fragrant (about 30 seconds).
1 tablespoon sesame oil, 2 cloves garlic, 1 teaspoon fresh ginger
Stir in the thawed, drained spinach, cooking for another minute to remove excess moisture.
10 oz frozen spinach, thawed and squeezed dry
Reduce heat to low and add cream cheese, sour cream, and mayonnaise, stirring until smooth.
8 oz cream cheese, softened, ½ cup sour cream, ½ cup mayonnaise
Mix in soy sauce, hoisin sauce, rice vinegar, honey, and red pepper flakes. Stir until fully combined.
1 tablespoon soy sauce, 1 tablespoon hoisin sauce, 1 teaspoon rice vinegar, 1 teaspoon honey or brown sugar, ½ teaspoon red pepper flakes
Chop pickled onions into small pieces and mix into dip.
Add mozzarella and Parmesan cheese, stirring until melted and creamy.
½ cup shredded mozzarella, ¼ cup grated Parmesan