Slice off the bottom of the stems; then, use a moist paper towel to gently remove any dirt from mushrooms.
Quarter or halve the mushrooms, depending on the size.
Sprinkle 2 tablespoons of water in the bottom of a 13 x 9 baking dish then place mushrooms in a single layer on top of the water.
In a small bowl combine next six ingredients: breadcrumbs through salt/pepper. Spray the tops of the mushrooms with oil then sprinkle the mixture evenly on top of the mushrooms.
Drizzle evenly with olive oil then spray the top with a little more olive oil spray so it's evenly coated. Bake uncovered until the mushrooms are golden, about 20 minutes. Optional, broil 1 to 2 minutes until golden. Serve hot or warm.