Freeze chopped onions: You can then just pull out a bag of chopped onions and use them in recipes whenever they call for chopped onion. Doing them in bulk like this saves a lot of time and effort–and tears
Homemade Pepper and Onion Relish (ala Harry & David). I love this. I often buy the real stuff when it is on sale but 3 for $9 is still a bit steep. Mix it with cream cheese and enjoy with tortilla chips. It is always a big hit at parties.