Pre-workout meals on the fly?

Starting BJJ today, again, but I have been super busy lately and have admittedly packed on a few extra pounds through fast food etc. I want to make the workouts count, while burning fat but still having energy to be effective.
Any ideas? I have about 45 min window to make and get something to eat before class starts. Phone Post 3.0

Fruit, mixed nuts.

Rouseys mole - McDonald's Phone Post 3.0
Ya. Ha ha that's what got me to the heaviest I have ever been. Lol VU Phone Post 3.0

Philip Proctor -

Fruit, mixed nuts.

Great thanks VU Phone Post 3.0