SHERLOCK
Homemade chips. He doesn't eat as often as normal people, and when he does eat it's usually something like chips. He hopes you like them too.
JOHN
A full English breakfast. He made it mainly because he was starving and had a huge craving for it. He's a decent cook, but his portion sizes are massive so there's no way you could finish it.
MORIARTY
A roast dinner. Jim is an amazing cook, not even slightly burning the food but allowing it to reach a nice crisp for texture. It's a small portion, but more filling than most foods you have ever eaten.
LESTRADE
Spaghetti. Greg wanted to make something easy to reduce the risk of him messing it up. So he chose this, and though it's not the best date food, you both enjoy it all the same.
MYCROFT
A stir fry. Mycroft loves colours and flavours in his food, and a stir fry gives him the freedom to experiment while still cooking something quickly for you to enjoy.