Just do a search in this forum... you will find the meal schedule.

I believe redeye flights feature a warmed cookie service after takeoff, and a light breakfast (continental style) prior to arrival.

As a first class passenger, you have access to as many snack items as you want. I believe they sell picnic boxes and various chips and sweets in economy class and you can get access to it. No sandwich, wrap or salad will be sold, but there are some filling snack items.

If you want fresh food, just have a meal prior to takeoff!

Carfield