Put equal amounts of nutritional yeast and pastry flour in a small sauce pan (I like a little more yeast than flour). Add enough water to mix them together. Heat on medium for just a few seconds to heat it up (you only need about 1/8 cup of each for one serving. This can be adjusted to the number of sandwiches you are making). It should become like a spread (peanut butter consistency). Add sea salt to taste.
Spread this on bread and add tomato if desired. Add pepper to taste. Butter the outside of your bread (I use Earth Balance, its vegan), and grill it in a pan like you would grilled vegan cheese.
I just discovered this the other day.....I had been missing the real thing after all of these years and this is even better! The cheeze spread is good on crackers too (the only bad thing is that it kind of reminds me of Cheeze-Whiz). But delicious anyway!