Preheat jaffle machine & butter one side of each bread piece.
Whisk eggs, cream, chives, salt & pepper in a bowl, add tomatoes.
Melt butter in a non-stick pan over a medium heat. When butter is sizzling, pour in half the egg mixture, cook for 1 min or until egg starts to cook. Stir mixture, from outer edge of pan to centre, until almost cooked.
Spoon the egg mixture onto 2 bread slices, top with remaining bread butter side up.
Place sandwiches in jaffle machine, cook for 5-6 mins or until bread is golden.
Repeat with remaining egg mixture, butter & bread.