The traditional food pyramid is being looked at by governments around the world and different recommendations are coming in to place. Of course in the US they no longer use a food pyramid and has been replaced with a food plate. The general trend is reducing carbohydrates and sugars in diets, and increasing vegetables. For The New Zealand governments current nutritional guidelines check here.
A lot of debate rages around fat, good fats bad fats and how official government nutritional guidelines should be in this regard.
Overall sugar is on the way out, and carbohydrates especially grains are becoming a smaller part of our diet.
When looking for an alternative to pasta, kelp noodles can do the trick. For a crunchy taste simply eat raw to have them more traditional boil and then eat.
Another alternative to pasta is cauliflower.With cauliflower it is best to grate it, then boil, add some butter and whip. Is it as nice as the real thing? Not quite, but with a bit of gravy on top or mixed int with a potato top pie it all tastes pretty good.
Of course you also want to look at cutting back manufactured products, and add as much clean wholesome food into your diet as possible.