You can swap rapini with another leafy green. If choosing kale, the kale will become crispy and chip like and therefore you may want to consider sautéing the kale separately in a pan.
Add some cheese! Try sliced provolone or mozzarella – super yummy when melted on the bread.
If you’re making these for packed lunches the meat and vegetables store really well separately in airtight containers. The meat can be kept for a week whereas the vegetables for 3 to 4 days.