A quiet cup of tea
PencilMedium

Build a sandwich from two thick triangular bread slices. A single wavy lettuce edge and a plain filling layer give you a clear exercise in stacked forms.
Draw the top triangle in perspective and add a narrow side for thickness. Place a second matching slice below it.
Fit one plain filling strip and one wavy lettuce edge between the slices. Hide their rear edges beneath the bread.
Add a few isolated crumb marks on the top slice. Use gray in the narrow wavy filling strip to clarify the stack, leaving the broad bread faces plain.
A small thing to tryKeep the two slices pointing in the same direction so the sandwich feels like one stacked form.