Can you have cheese? My daughter likes a piece of cheese or cottage cheese and fruit. She also often eats raw carrots for breakfast. She just loves them! Or apple slices and nut butter. She can't have peanut butter but can have sunseed butter.
The Zucchini bread recipe in the recipe section of this website (not the forum) is great! I make it without nuts and with an egg replacer. I usually make it in the form of muffins and they do freeze well. I have made other gluten-free muffins and pancakes and freeze those too. Have made gluten-free bagels. Daughter liked them but they are in no way like a wheat bagel. I have also made a foccacia bread, leaving out the savory herbs that are normally in the recipe and subbing in a little cinnamon and sugar or artifical sweetener. Cut it in strips after it comes out of the oven. You can then top it with something like a fruit pie type filling or a little sweet glaze if you want. Can also add nuts.
I like to eat polenta for breakfast. I buy the tubes of precooked. Slice, top with a little tomato sauce and microwave till warm. I eat with some pumpkin seeds or nuts on the side for protein. But if you can have cheese, cheese melted onto this is great!
I also like grits but am usually too rushed in the morning to want to bother to make them. They are great with maple syrup and butter on them if you can eat that many carbs. But you could probably get the same result with a drop of maple flavoring. Oh... Now I want some! Saw grits at the store today but did not buy. *Whips out grocery list and adds grits to it* Also good with cheese melted in.
You can make a crustless quiche with eggs, any kinds of vegetables that you like, meats, cheese, etc. Can be eaten cold or hot.
You can make trail mix with assorted nuts and seeds, dried fruit, coconut. Use more seeds than nuts to lower the price. Unless you get a really good price on nuts! And you can add gluten-free cold cereal to this to lessen the cost.