• Bring a large pot of well-salted water to boil, then drop in broccoli rabe. Cook for 1 minute.
• Drain broccoli rabe in a colander and rinse under cold water until cool. Using your hands, squeeze as much water out of the broccoli as possible.
• Roughly chop the broccoli, removing any large, tough stems.
• Heat 2 teaspoons olive oil in a medium pan over medium heat.
• Saute garlic and crushed red pepper flakes in oil until fragrant, about 1 minute.
• Add broccoli rabe to pan and cook until heated through and tender (about 3 to 5 minutes). Remove pan from heat and season to taste with salt.

Assemble sandwiches:

• Place 2 slices of cheese on a piece of bread. Top cheese with a ¼ of the broccoli rabe, then 2 more cheese slices. Cover with another bread slice. Repeat process with remaining ingredients.
• Heat a pan over medium heat.
• Brush outside of sandwiches generously with olive oil, then place in pan.
• Cook sandwiches on one side until golden brown. Flip and cook until other side is also browned. (You may need to do this in batches.)
• Remove from pan, then serve sandwiches immediately. Enjoy!