Earth Oven Form

Constructing an earth oven generally requires a form that the mud rests against as the oven goes up. from Earth Oven Adventure
Most folks use a simple sand mold.

from The Bread Ovens Of Quebec
But traditionally in Quebec, a framework of alder saplings was used.

Here, a boat builder has used his skills and the materials he had on hand to build a simple framework of cedar, plywood and cardboard.

And then shares a pizza he made just a few hours after the oven was constructed.