Spread 4 slices of the bread with peanut butter. Spread remaining slices of bread with jam. Sandwich one peanut butter and one jam bread slice together to make four peanut butter and jam sandwiches.
Lightly whisk eggs and milk in a medium bowl to combine. Dip sandwiches, one at a time, into egg mixture. Melt 10g (½oz) butter in a large frying pan over medium-high heat; cook one sandwich for 3 minutes each side or until golden and crisp. Transfer to a plate; cover to keep warm. Repeat with remaining sandwiches, using 10g (½oz) butter for each.
Cut toasts in half; serve hot with whipped cream and fresh strawberries, dusted with sifted icing sugar, if you like.