Bring a large pot of lightly salted water to a boil. Add penne pasta and cook for 8 to 10 minutes or until al dente; drain.
In a large skillet over medium heat, heat the olive oil. Add the onion and garlic and sauté for a few minutes until softened. Add the mushrooms, oregano, basil, thyme, salt, and pepper, and sauté for 5 minutes.
Stir in diced tomatoes and cook for another 5 minutes or until the sauce is thickened. Remove from heat.
In a greased 9x13 inch baking dish, layer the cooked pasta and the mushroom-tomato mixture. Sprinkle the top with mozzarella and Parmesan cheese.
Bake in preheated oven for 15 minutes, or until cheese is melted and bubbly.
Interesting Facts
Portobello mushrooms are a type of mushroom that is native to Italy.
Penne pasta is one of the most popular types of pasta in Italy.
Parmesan cheese is a type of hard, aged cheese that originated in Italy.