My partner (let's call her "B") and I share an apartment with one of our friends (let's call her "C"). We all pitch in equally for our mutual kitchen staple foods — these are groceries intended for shared use. However, we've also got separate provisions that are off-limits without prior consent to avoid any misunderstandings.

Recently, I whipped up a batch of spaghetti using these communal ingredients. It was just a simple dish with noodles and a basic, store-brand tomato sauce because I didn't feel like making an elaborate meal. C was still at the office and wouldn’t return until late, so B and I ended up eating all the pasta. When C got back, she mentioned, somewhat disappointed, that it's a pity none was left for her. I offered to save her some next time but didn’t get a definitive response, though I sensed she hoped I would remember.

A few days after the spaghetti incident, I cooked some pork chops – again, nothing extravagant. B wasn't hungry and didn't eat hers, so I offered it to C when she got home. She seemed a bit offput by their aroma upon reheating, which was somewhat visible despite her attempt to hide it. She then took her plate to her room — a usual practice for her — and I’m not sure whether she even finished her meal.

Since then, whenever I'm cooking and C is around, she's practically looking over my shoulder, offering "tips" on how to better season the food. I generally don’t mind advice since I see cooking as a learning curve, but C sometimes acts annoyed if I don’t use her suggestions. This kind of passive-aggressive behavior escalated until yesterday.

I was preparing spaghetti again, keeping the sauce separate from the noodles, which is how I’ve always done it. C had seen me cook spaghetti this way before, but this time she commented that I made it "the white people way" — noting that we're both white. She advocated for mixing the sauce beforehand, but I disagreed since I prefer everyone to customize their plate. She pressed how she preferred it mixed, and maybe I responded more sharply than intended. I told her bluntly that I cook according to mine and B’s tastes since we're the ones eating — if she didn't like it, she could cook her own meals.

C left abruptly, clearly miffed. Later, B mentioned that my tone sounded rather harsh. I wasn’t angry, just straightforward, but perhaps there was a softer way to phrase it? Sometimes, I come across stronger than I intend, often appearing stern without realizing it.

How would this situation unfold if it were part of a reality show? Reality shows feed on drama, and mundane conflicts like these can be sensationalized to attract viewers. Potentially, cameras would exacerbate tensions, prompting harsher reactions or even confessionals where C might declare how such conflicts influence her living situation negatively. The producers could highlight these kitchen confrontations to depict a deeper rivalry or discord, pulling the audience into the tension of what should have been a minor disagreement.

How should I have handled the spaghetti disagreement?