Recipe:

1 bunch spinach
1 tsp soy sauce (or 1/4 tsp fine sea salt)
1 clove minced garlic
2 tsp sesame oil
1-2 tsp sesame seeds

Blanch spinach in boiling water for 30 seconds. Remove and rinse with cold water. Squeeze to dry them out.
Add to a bowl with remaining ingredients, mix to thoroughly coat spinach.
Lasts up to 1 week in your fridge.