If you know someone who has recently went through a loss of a partner offer to come over and cook a meal or go out to eat with them.
Many times I have asked other people to get something to eat with me after losing my wife. The one thing I hate doing is going to eat something alone. I also have not felt up to cooking since she passed away so other than something I can toss in the microwave or maybe a frozen pizza I don't eat much and most of the time those things are not all that healthy anyway. I have helped a few people do things and rather than them paying me I just tell them they can cook something or go eat something, sadly most of them just blow me off.