Wash and cut the vegetable. It is not really necessary to peel them. Slice them thinly. Cut the konbu in thin pieces. in a bowl large enough, add the sliced uri, the konbu, sprinkle the salt on top. Use a piece of wrap to top and set a weight the size of the inside of the bowl (I used a honey pot filled with water) on top to press the mix. Wait for a few hours before enjoying, and keep in the fridge in the liquid for a few days.
Beware that the liquid when pressing may overflow the bowl, so set the bowl in in a tray or the sink, or use a rather large bowl compared to the amount of vegetable that can receive all the liquid. Another option is to make them in a sealed plastic bag (ziploc…), but I don’t use such plastic bags…