Cake suggestions and recipes for a 17 cm glass cake dome??

I have just purchase a 17cm glass cake dome. It will house a 15cm round cake quite comfortably.
It is very pretty and classy but the problem is , i don’t have a suitably sized cake pan for it. Can i use a loaf pan to bake a chiffon cake and then cut it into half and then add some cream filling? (So it will be a stacked square cake..)
Actually, i just want to have a pretty dessert to showcase!!Any suggestions WITH RECIPES will be extremely welcome!!! thanks in advance!!!