hey there ! Answering a little late but this might help others peep's if not you !
Do you think the problem is your food or the fact that you have to wear thiner gloves in order to work as a chef ?. because if it's the last option, changing your diet might make it worth: raw foods are the best empowerment tools for your body to warm himself up. Ginger is a great option but remember any raw food is a superfood and that the more the better. Don't lose yourself in trying to lift seperate symptoms, heal your body/re-empower it and wear warmer gloves;
Have you talked to your superiar about that ? Working in a tent with (almost) naked hands isn't great for anyone haha
Good luck buddy !