Heat broiler (or toaster oven). Place 8 square whole-wheat crackers on a broilerproof (or toaster-oven) baking sheet.
Dividing evenly, top crackers with 3 tablespoons jarred marinara sauce and 3 tablespoons shredded part-skim mozzarella cheese. Top half of the crackers with 1 tablespoon thawed frozen chopped broccoli.
Broil until cheese has melted, 2 to 3 minutes.
These are a perfect after school snack for teachers too :) I just made them using rosemary olive oil triscuts and they were delicious! I downed 12 of them...I don't know who could eat only 8.