The best thing I use is like a mini quiche:

Grate any veg you have (zuccinni, carot, pumkin, sweet potato etc) about a cup in total.
Add about 1/4 cup grated cheese. Mix all this and put into mini muffin tins.
Beat two or three eggs, mix with 1/4 cup milk and two or three heaped cereal spoons of SR four. Pour this over the other mix until you can see it just below the surface.

Throw all into the oven (180) for about 20 mins.

My DS loves these and they will last in the fridge for a few days.