Personally, I make sure they have plenty of seed in their dishes before bed in case I sleep in or have a doctor's appointment I've forgotten about. However, if you wake up before or around the same time as your budgies do, you could just leave a bit of food for a morning snack before they go to sleep, then you can get them to eat their veggies, sprouts, etc., when they wake up.
Samantha, Charlie, Ju, Rumi, Lara, Pollo, Ziggy, and Alice
Rest in Peace
Sam, Nova, Joey, Maria, and Scarlet (March 4, 2014)
In the wild budgies tend to fly from food source to water to food source and generally forage. Our budgies don't have good night vision, but in saying this I know my guys all eat at night time. Also when I first uncover them they are more often than not eating so I would leave the food in over night.