Heat Skillet and add olive oil
Place onion, bell peppers, oregano, sea salt, and bay leaf in skillet and sauté
Boil tomatoes for 10 minutes
Place in ice water for five minutes, drain and remove skin from tomatoes
Blend tomato in blender
Add tomato sauce in skillet with sautéed seasonings
Simmer for 30-45 minutes
Set aside half of sauce to be used to make mushroom sauce, remaining half to be used when layering.
Place mushrooms in water, soak for 1 minute, strain and slice
Season to taste sauté for 2 minutes and add 1/2 of saved sauce (see above), set aside for layering.