Less farting about! No mess! Small quantities! Keeps colour!
1lb raspberries
1lb sugar
2 Tbs lemon juice
Stick everything in a BIG pyrex bowl. Stick it in a micro & give it full power (plus the occasional stir) for 5mins 'til sugar well-dissolved. Cook for 12mins on full; stir well at end. Set-test is same as ever, but don't mess wi'cooking time as the sugar can readily burn. Stick into clean, warm jars.
Can use other, & mixed, berries. Can upscale pro-rata.