How can I introduce green vegetables in my 11-month-old's diet? Can anybody suggest some recipes?

Besides making purees, how about making a healthy smoothie for baby? You can incorporate green veggies like kale or spinach to the smoothies along with other of baby's favourites fruits and veggies. This page has some recipe ideas you can try: http://homemade-baby-food-recipes.com/smoothies-for-babies-delicious-and-nourishing/