What are the three main ingredients of lean dough?

Lean doughs are characterized by their simplicity and minimal ingredients. The three main ingredients are:

1. Flour: Provides the structure and bulk of the dough.

2. Water: Hydrates the flour and allows gluten development.

3. Yeast: Responsible for fermentation, which creates air pockets and gives the dough its characteristic texture.

While some recipes may include additional ingredients like salt, sugar, or oil, these are generally considered secondary and their quantities are usually small compared to the three main ingredients.