Strawberry Jam

I had leftover strawberries after Midsummer, turning a little soft and mushy. What to do? Jam. Obviously. 

So. I used 500 g of strawberries, zest and juice from one lemon, and seeds from one vanilla bean. I blitzed this quickly with a stick blender, then added 400 g of jam sugar (with pectin). I let it sit for about an hour, then boiled it vigorously for five minutes. And that was that. Done. 

Made three small jars. (And a half, actually.)