Guavas cooked with panela, cinnamon and vanilla, blended and strained to get the seeds out, then reduced until it sets. Makes about one jar, and the seeds are the reason for the sieve.
Guava seeds are hard and numerous and the sieve is not optional: they will not soften however long you cook them. Push the pulp through with the back of a spoon and expect it to take a few minutes. To know when the jam is ready, put a saucer in the freezer at the start; drop a little jam on the cold saucer, wait thirty seconds and push it with a finger. If it wrinkles, it is set. Guavas are high in pectin, so this jam sets without any added, and it will thicken further as it cools. Makes about 400 ml and keeps several weeks refrigerated.