Bring a large pot of water to a boil and add 1 tablespoon of sea salt.
Blanch the spinach for 30 to 45 seconds until wilted and bright green.
Transfer spinach to an ice bath immediately, then drain and squeeze firmly to remove all excess water.
Cut the squeezed spinach into 2-inch lengths and divide into two equal portions in separate bowls.
To create the Savory Version: Mix one portion with 1/2 tbsp soy sauce, 1 minced garlic clove, 1 tsp sesame oil, 1/2 tbsp sesame seeds, and half of the chopped green onions.
To create the Spicy Version: Mix the second portion with 1 tbsp Gochujang, 1/2 tbsp soy sauce, 1 tsp sugar, 1 tsp rice vinegar, 1 minced garlic clove, 1 tsp sesame oil, 1/2 tbsp sesame seeds, and the remaining green onions.
Massage the seasonings into the spinach by hand in each bowl to ensure even distribution.
Serve both versions at room temperature or chilled as part of a traditional Korean meal.