Peel the pineapple.
Core and cut into chunks.
Blend and sieve with a strainer or a cheesecloth, to make it sieve easily add water when sieving it. I used one cup you might lesser than that or more.
Place a saucepan over medium-low heat and pour the pineapple mixture and sugar and boil.
Continue to boil until it reduces to the consistency you want but keep in mind that it thickens a little more when it cools down.
Let it cool down completely and pour into a sterilized jar and store in a refrigerator.