In the Netherlands open faced sandwiches are pretty common snacks kids will make. Slice of bread commonly with toppings like ham, gouda, hard boiled egg, etc. Also peanut butter is a popular topping for bread, though having it with jam is a lot less common than in the US.
A very specifically Dutch thing would be piece of toast with butter and then literally sprinkles on top (like you might put on ice cream). The Dutch eat a shitload of that stuff. Also popular on buttered toast or rusk are little anise seeds coated in sugar, referred to as muisjes.
Enshittification strikes again