Broccoli is very low in calories, contrary to its fulfilling taste. 100g gives a mere 34 calories! 100g bread is 244 cal.
1NLEA serving (the serving size defined in Nutrition Labeling and Education Act) for broccoli is 85g, raw or boiled.
What does this give?
Around 30 calories.
About 100% of the daily values for Vitamin C and K.
Boiling does not seem to destroy much of the nutrients, but there is some damage. Below is a snapshot of Vitamin C and K with raw, boiled, and frozen-boiled broccoli. All for 85g.