A proper bowl should be thick enough that a spoon can stand up in it — that's the informal test Dutch cooks use to know it's done right.
Dried split peas are simmered for hours with smoked sausage, bacon and root vegetables until they break down into a thick, dark green soup, usually finished with a slice of rye bread and bacon on top. Winter markets and ice-skating events around Zuid-Holland ladle it out from big pots to warm up crowds outdoors.