Rinse the raspberries under running cold water, drain well and transfer to a non-metallic bowl and cover with sugar; leave for several hours/overnight.
The next day transfer the raspberries with sugar to a pan, add the lemon juice and rind, gently bring to boil; lower the heat and cook for 30 minutes. If there was not a lot of juice when you transferred the raspberries to the pan, you have to bring the jam to boil very gently, so the sugar doesn’t burn. You will also have to be very careful when you stir because the raspberries break easily so you can try to shake the pot instead, or if you have to stir, do it carefully with a spatula.
Leave the jam in a cold place for approx. 24 hours.
The next day bring the jam to a boil and simmer it on a medium heat for approximately 30 minutes until the confiture reaches the right consistency.*
Remove the lemon peel and pour the confiture to prepared jars**, cover with lids, seal and put all the jars upside down on a towel, then cover them with the towel tightly. If you spill any of the confiture on top of the jar, clean it well.
Keep the jars covered for a few hours. Afterwards, you can keep them in a cool place for up to a year.