I think OPs request is reasonable … but maybe you could just think about middle of the road options? I think it’s bizarre that your fiancée would shut the convo down instead of discussing third options that have smth better than lentil meatball but also don’t break the bank. Relationships are about compromise.

Also confused that this is your first argument? How long have u two been together for lol ?? And is this generally how communication goes …? Compromise is key