Butterfly your pork tenderloin (lengthwise down the middle)

Mix together all ingredients except mushrooms and lemon to make a sauce.

Drizzle with olive oil, salt and pepper as desired.

Add a row of mushrooms

Using cooking twine close the tenderloin

Place in deep dish pan

Pour sauce over meat

Squeeze fresh lemon over meat or add a layer of lemon slices on top

Bake at 350°F until the meat's internal temperature is 160° (making sure the probe is in the meat and not sitting in with the mushrooms)

Approximate cook time should be about 30 to 45 minutes.

Use the extra sauce at bottom of pan for dipping!