lazy cooks grape jam

Hello!I love making preserves..........as you can check out the apple and fig jam..here.. and the gajar,gobi shalgam ka achar..here..........so when I saw.la@foodslice's.....purple grape jam...in all its purple glory..I just knew I had to make it  ASAP!She had made a very nice loaf with it too.I got the grapes, guarded them with my life(I have grape thieves around)..and made the jam on the stormy Sunday morning!Its a really easy recipe...and the jam is simply superb........thank you so much..la@foodslice...THANK YOU.....I simply loved the recipe.....and the whole family freaked out on the jam.....its being had on toast,on roti..or simply in a spoon! 
INGRDS
1 kg seedless black grapes......washed..and removed from the stem
2 cups sugar
METHOD
1.Put the grapes in a blender and blitz for a few seconds(you do not want complete mush..a few pieces here and there is good)
2.Into a heavy bottomed pan on medium high heat ,heat till bubbles appear on the side.then put the sugar in .....stir.
3.Let this bubble away for about 25 mins,stir once in a while...with a wooden spoon.....,.then after 25 mins....check for doneness.......simply take the spoon out of the purple madness..and draw a line in the back of the spoon (use your finger)...if the two halves don't make any attempt to get together..then the jam is done!

4.On toasted bread.its beyond divine............yum...yum.