Step 1

In a large, deep skillet, heat the olive oil over medium-high, and then add the garlic and onions. Cook about 2 minutes.

Step 3

Next add the tomatoes, tomato paste, sugar, basil, and oregano. Cook for about 5 minutes until the tomatoes and onions are softened and most of the liquid has evaporated.

Step 5

Add the mushrooms. Cook about 2 minutes, just until the mushrooms begin to darken and shrink. Stir in the salt, pepper, and crushed red pepper. Remove from the heat and set aside.

Step 7

Preheat your broiler to high and broil the sandwich buns cut-side up on a baking sheet. Remove after 1 to 2 minutes when they are slightly browned. Remove the top portion of the buns from the baking sheet and set aside.

Step 9

Top each bottom bun with about ¾ cup of the mushroom mixture and then top with 2 tablespoons of cheese. Place the baking sheet under the broiler for about 2 to 3 minutes, or until the cheese is browned and bubbly.

Step 11

Remove from the oven, transfer the bottom bun to a plate. Place the top portion of the bun on the sandwich and serve warm.