Sausage - Cheap and cheerful
Definitely! I bought some gluten-free sausages recently by (expensive) mistake. 97% meat may be wonderful if you're coeliac, but they're not a proper banger.
Another major feature of a fried breakfast has to be the presence of 'burnt crunchy bits' which I agree with Terry Pratchett forms one of the four main food groups (the others of course being sugar, starch and grease)