I am doing my homework and I have to write how to cook a curry, I want it to be grammatically correct. Which one of these is correct?
Use the spices 37 minutes before the curry is ready
Use the spices at 37 minutes
Which one is correct?
Hard to say which one is correct as they both mean very different things.
... at 37 minutes
This would mean 37 minutes from the start.
... 37 minutes before the curry is ready
This would mean 37 minutes before the finish. While it could be used in other contexts, it seems highly unlikely such an instruction would appear in a recipe method, as it requires you to make a calculation based on the amount of time the whole recipe takes to prepare and the amount of time that has already passed.