Spreadable base (butter, fromage frais, sauce, etc.)
To cover the entire surface of the bread with your sauce, spread the mixture from the centre towards the ends.
Arrange layers of vegetables (tomatoes, cucumber, etc.), alternating the ingredients, starting from the ends and going towards the middle, or by superposing them.
Cold cuts, meat, poultry, fish
Start at one end and go towards the other to cover the base of the bread.