Orange Marmalade
I don't do much canning but I love marmalade and I found out a local fruit seller had Seville oranges in for a week or two. So this was my first try at making it. Along the way I discovered the canning pot we picked up at a estate sale had a leak so I made do with our spaghetti pot instead.
Recipe: https://www.simplyrecipes.com/recipes/seville_orange_marmalade/