How do you say sandwich with 3 toppings?

There isn't a specific, widely-used phrase for a sandwich with 3 toppings. However, you can describe it in a few ways:

Simple descriptions:

* A sandwich with three toppings (This is straightforward and clear)

* A triple-decker sandwich (If the toppings are stacked high)

Descriptive:

* A sandwich with [topping 1], [topping 2], and [topping 3] (This lists the specific toppings)

* A [type of bread] sandwich with [topping 1], [topping 2], and [topping 3] (This gives more detail about the sandwich)

Informal:

* A loaded sandwich (This suggests a lot of toppings)

* A gourmet sandwich (If the toppings are fancy)

Ultimately, the best way to describe a sandwich with 3 toppings depends on the context and the level of detail you want to provide.