Massage 1/2 cup salt into grated green papaya and add 1 Liter of water. Let it soak for 1 hour. Squeeze with both hands and wash with clean water 3 times. Place squeezed green papaya in a clean cloth and squeeze out as much moisture as possible and set aside.
Dissolve salt and sugar in vinegar. Boil vinegar, salt and sugar for 10 mins on low heat and let it cool down.
Mix together: squeezed-out grated papaya, chopped garlic, tiny cubed cut carrots and sweet pepper.
Fill 1-inch papaya mixture into a jar. Place decorated carrots, onions and strips of sweet pepper on the side of the jar and fill in more papaya mixture. Repeat the procedure until all papaya mixture and decorations are all in.
Pour in cold vinegar-sugar-salt mixture and squeeze down papaya with the use of the back of a spoon to completely soaked through all of papaya mixture.
Cover the jar tightly and let the atchara soaked in the jar for at least 2 days before serving.