I had a huge amount of success with tomatoes in our previous house (growing them on the windowsill in the kitchen and then out in containers over the summer — huge healthy plants and lots of fruit), but when I tried to grow them here, the plant got blight.

Noted about the mint — I had an unkillable mint plant in our previous place that spread to fill the whole garden bed!

Thanks for the other herb suggestions, they're excellent — and glad to be able to benefit from your gardening knowledge, even if you're not able to grow your own (those temperatures sound unbearable!).