Put olive oil into the frying pan and bring the heat to medium level.
Add the chopped onions and saute until the onions get soft.
Add the chopped baby spinach leaves and saute for about 15 minutes until spinach leaves release their juice and get mid-roasted.
Before you serve the dish, mix the minced garlic and yogurt in a separate serving bowl.
Garnish with red pepper flakes.
Serve Cold