With the grazing I try to offer a selection at each meal (including snacks).
So breakfast might be - cereal (usually nutrigrain) with milk, and some tinned fruit in natural juices, plus some fresh orange juice
Snack - heinz toddler meusli bar, some crackers, some fresh fruit, some dried fruit - this could be eaten over a period of a couple of hours
Lunch - sandwhich with cheese and turkey, or peanut butter, or a plate of salad and meat, since she usually tears the sandwhich apart to eat each ingredient seperately anyway, followed by a small yoghurt
Snack - a chocolate, more fruit, more crackers, cheese, popcorn (again eats from waking from nap, right through to dinner...or picks
dinner - veggies and meat usually, or maybe pasta/rice
She eats very small quantities of the foods I offer, but if I let her graze all day long, we eventually get a decent amount of food in, and we check of all the food groups....
HTH