Stay

Steve used to own a bakery with his mom before the war. His favourite customer was Bucky Barnes, his longtime best friend. When his mother died and Bucky went to war, Steve closed the shop in efforts of joining his friend on the battlefield. Almost a century later, Steve reopens the bakery after retiring from the Avengers, ending up in the same location in Brooklyn. Coincidently, his favourite customer is the same, too.

This may be classified as an AU, I'm not sure. It doesn't follow any direct storyline, but it hints at events from the movies. As a result, there are no spoilers, but if you know the movies there will be awesome references.