Shredded cheese is almost always more economical than loaf or sliced cheese, for me. And it's very convenient for adding to pizzas, or making cheese sauces, or topping casseroles.
But not so convenient for topping burgers or sliding between bread for grilled sandwiches. However, there's a simple trick to turning the shredded into "slices".
Remove the turntable from your microwave, and place a sheet of parchment paper on it. (Dollar Tree now sells parchment paper.)
Make neat piles of shredded cheese, about 3 inches in diameter, on the parchment, using about 1/3 cup of cheese per pile.
Place the turntable/parchment/cheese into the microwave. Microwave on full power in 10 second increments, until cheese is nearly all melted, watching closely (just under 30 seconds for my microwave and 4 piles of cheese).
Chill turntable/parchment/cheese in the fridge for 30 minutes. Then peel the "slices" off of the parchment.
The parchment paper can then be rolled up and stored in a large ziploc in the freezer, and reused many times for this.
These "slices" melt nicely on burgers and in sandwiches.