How would I create a constructor factory?

Cloning objects

// http://oranlooney.com/functional-javascript/
function Clone() { }
function clone(obj) {
    Clone.prototype = obj;
    return new Clone();
}

Food = function(type, slices){
    this.type = type;
    this.slices= slices;
    this.eat= function(){
        this.slices --;
        console.log('I ATE 1 Slice I have ' + this.slices + " left!");
    }
    this.status = function(){
        console.log(this, 'I am a ' + this.type + ' and I have ' + this.slices + " slices.");
    }
    this.toppings = {};
}


Pizza = new Food('pizza', 8);
Pizza.status();

my_pizza = clone(Pizza);
my_pizza.status();
my_pizza.eat();
my_pizza.status();
Pizza.status();

// But what about the DEEP toppings object?
my_pizza.toppings.peperoni = 'OH GOD YES';

my_pizza.status();
Pizza.status();

// =(

I did what I think is a shallow clone - a prototype inheritance http://oranlooney.com/functional-javascript/