Combine all ingredients in a food processor and process until a smooth(ish) mixture forms.
The mixture should be very soft, easily squished into a ball, and possibly a little warm.
Try rolling a small amount into a ball - if it seems too gooey to roll, add a little bit more oats and process until evenly chopped. If it seems too dry to hold together, add another sprinkle of sultanas and process again.
Roll mixture into bite-sized balls about 2cm across. Place on a plate, cover, and put them in the fridge to cool.
Store in the fridge in an airtight container for about a week.