Step 1

Pre-heat oven to 400F degrees.

Step 2

Cut the tomatoes into quarters and place them on a large cookie sheet. Sprinkle with oil, oregano and salt and pepper to taste.

Step 3

Slice off the end of a garlic head (root side) and place the whole head in a small glass bowl. Sprinkle with oil and place the glass bowl on the cookie sheet with the tomatoes.

Step 4

Bake for about 45 minutes.

Step 5

When done, remove from oven. Remove the garlic cloves from the peel using the teeth of a fork. Set aside.

Step 6

Heat a cast iron or saucepan and add the roasted garlic and tomatoes. Add the mushroom sliced in half and cook for 5 minutes.

Step 7

Remove from heat. Add fresh basil and parmesan cheese (if desired). Serve hot and store remaining sauce in an air tight jar or glass bowl with a tight lid. Keep refrigerated.