Heat the oven to 220C/200C fan/gas 7. Mix the olive oil with 60ml water, then put in a bowl with the flour, salt, sugar, sesame seeds and a few drops of the food colouring. Mix with your hands until you have a rough dough. If it's too sticky, add a little more flour until it’s smooth.
Sprinkle a non-stick baking mat or a sheet of baking parchment with some flour, roll the dough out to the thickness of a £1 coin, then use a pizza cutter or knife to cut it into skinny strips. Brush the strips with a little water and sprinkle with some salt and extra sesame seeds. Prick each strip with a fork.
Transfer the strips with the mat to a baking sheet, separating the strips with a palette knife, and bake for 12-15 mins, or until the crackers are firm and feel hard. Leave to cool. Will keep in an airtight container for up to two weeks. Arrange your selection of cheeses with the fruit and crackers on a serving board.