Coffee and toast with marmalade or jam- no point trying to get DCs to sit at the table or pretend to be interested, Unless it's chocolate 
Big breakfast on Christmas Eve and Boxing Day though ( Linda Mc mini sausage, quorn 'bacon' eggs, potato scones, beans, fried mushroom, toast and lots of coffee. I've got one of those Perfect Housewife heated food thingies with 3 covered dishes)