Rachy, I have just suggested two books in another food chatter, and I would suggest that you try to get at least one of those books. Krystal will follow in the eating habits of yourself and DP, so if you have to prepare two different meals for you two already, she might want you to prepare her something different again.
I really don't to sound like I'm telling you off, because I definitely am not.
I think you should find a way to change what you eat. Do you live on biscuits and chocolate because you can't cook? (You don't have to tell me the answer). Go and explore your local greengrocers (not in the supermarkets!), and butchers.... See what fine food they have to offer you. Go to the library and flick through cookbooks on everything from casseroles to pasta, maybe avoiding the ones of cakes and wicked desserts. As much as I love sweet things and desserts, sugar alone cannot sustain us.
My little girl is almost ten months old, and she eats what we eat. Everything, even spicy food. I haven't bought any baby food for months. Create healthy eating habits for Krystal, but firstly, for yourself. And you will feel better for it.
I hardly ever make casseroles, but they are not difficult. Pasta and rice are all the go in this little black duck's house, but we do have the occasional stew and peasant style food. European habits die hard We eat a fair bit of steak, and chicken. Often , we have pasta, veg, and meat. Not pasta as in spag bol, but the Continental pasta and Sauce ones (be it continental/san remo/coles or safeway brands, even aldi have their own), with a heap of veges thrown in once it has started to boil again. Between the Man, the Boy, myself, and bub, we cook up two pasta packets, and at least two cups worth of veg, usually frozen peas, corn and beans. Its not hard.
Goodness, I seem to have rabbitted on. And I didn't tell you how to make a casserole! My apologies. But do get yourself on of these books, or anything similar.