|I made this particular grilled cheese using Trader Joe's Soy Blend of Mozzarella, Jack, and Cheddar Flavors.|
One version of sliced cheese singles I can recommend are Veggie Slices. These are soy based, but they do contain milk protein so watch out if you are allergic. They taste terrible on their own but make a great grilled cheese sandwich. I've used them for cold sandwiches but I'd honestly rather do without the fake cheese. This stuff tastes best cooked in something or melted.
If you are looking for vegan and completely dairy free, I always recommend Daiya Shreds. Although for taste, I prefer soy blend cheeses. Two other types I like are Trader Joe's soy mozzarella and shredded soy blend. These are sometimes hard to find in the cheese aisles so look thoroughly. I always find Daiya Shreds and Veggie Slices at Whole Foods.
Other pluses to lactose free cheeses: no cholesterol, less saturated fat, less sodium, and easy to digest.
Adding another filler in your sandwich blends with the fake cheese, making it taste more authentic. I like to add pickles, tomatoes, bacon, or all three to perfectly replicate a dairy grilled cheese sandwich. Get a nice, thick bread, like sourdough, spread on the SmartBalance Light, and honestly, it's hard to tell the difference.