How can I store chopped onions in the fridge without the smell?
I am cooking for a large group and am trying to do as much as I can in advance. One thing I would love to do in advance is chop several onions. I have done this before with a single onion; I stored the chopped onion in a plastic storage container (sealed with the lid) in the fridge. About 6 hours later, the smell of onions was very strong both in the fridge and on everything that was in the fridge. I can't imagine it with 4-6 onions!
What can I do to avoid the smell, not ruin everything in my fridge, but still be able to do the preparation 6-8 hours in advance?
I regularly store chopped onion in my refrigerator (or at least halves & quarters).
I either use tight-sealing plastic containers or zip-top bags. You may want to double-bag in zip-tops to be sure to avoid a smell.
One problem you may be having is onion-ness getting on the outside of the container. Be sure the outside is all clean and dry - no point in having a nicely sealed packet of onion when the outside can get all stinky anyway.
Sounds right to me; double bagging is a good idea as it will both solve the issue of anything on the outside of the first bag, and I believe roughly square the impermeability of a single bag.