Oooh I love guavas, the only thing I love more is stewed guavas..
My recipe is simple, chopped guavas covered with 1,5 cups of water to 1 cup of Selati organic sugar and a cassia [or cinnamon] stick. Bring to the boil, and simmer until guavas are soft. Allow to cool poor off the syrup and keep in the fridge.
They can be stored in preserving bottles but we eat them so fast that I dont see any reason to squeeze them in small bottles. Instead I put them in a glass bowl in the fridge. They can last for a week but we usually finish them in 2-3 days. I strain and freeze the syrup and re-use this the next time I make guavas.
Best served with fresh custard, yum!