First, you’ll mix together your vegan Russian dressing. In a small bowl add the vegan mayo, ketchup and Worcestershire sauce. Blend well using a spoon or fork. Set aside.
Gently spray two skillets with cooking spray and place them over medium heat.
Add your oyster mushrooms to one skillet. Cook until the mushrooms get a light brown sear.
While the mushrooms are cooking you will butter all four slices of bread (one side only).
In the second skillet you’ll add your buttered marble rye. (Buttered side down on the skillet).
Top 2 of the 4 slices of bread with 2 slices of cheese (one slice of provolone and cheddar per sandwich)
Once the bread is toasted and the cheese begins to melt, remove the bread from the skillet.