Even if working from a fixed recipe (a starting point in most cases) last minute changes can be made to accommodate personal tastes. This sandwich is made with sourdough bread from the local bakery. I prefer the Swiss cheese and the wife prefers the American cheese. I like a bit of onion on mine and my wife does not. Here both versions of the same sandwich are being made side by side. What have you done lately to personalize your food?
Our GE counter-top grill has interchangeable plates, one for paninis, and does an excellent job. A large cast-iron skillet with a smaller skillet sitting top of the sandwich works just as well so you can make panini sandwiches without the need for special tools or appliances.