Prepare all ingredients, slice the French bread lengthwise, and cut meats, cheeses, and veggies into manageable pieces.

Spread a generous layer of mayonnaise on the inside of both slices of bread.

Layer with turkey, ham, roast beef, cheeses, and optional veggies like lettuce, tomatoes, and pickles.

Use toothpicks or skewers to secure tall layers before slicing.

Wrap the sandwich tightly in plastic wrap if storing in the fridge.

When ready to serve, slice into thick halves or thirds and enjoy with sides.