Place all Baked Beans ingredients in a pot (except beans) and stir, then add beans.
Bring to a simmer, then lower heat to medium low and simmer for 20 minutes, without the lid. Stir every now and then so the beans don't catch on the bottom of the pot.
To thicken sauce: Mix cornflour with water. Pour into pot while stirring, then cook for 2 minutes until sauce thickens – it will thicken quickly
Check for salt: taste and add more salt if needed.
Serve it the traditional way – piled over hot buttered toast. Or ladle into bowls, eat with a spoon and dunk in hot crusty bread!