Slice or break up broccoli into florets, slice garlic
Boil a large pot of water
Put broccoli into boiling water for 2 minutes
Immediately put into ice water, put in ice cube if water heats up
Heat up cast iron pan for at least 3 minutes on high
Add some oil and add the broccoli, turn several times to get a little bit of searing
Remove broccoli. Add garlic and chili and give it a quick sear. This step is pretty quick as garlic can burn fast, especially since your pan will be extremely hot.
Add lemon slices, and/or squeeze some wedges on the broccoli. Server.