1. Prepare the Dough:

1. In a small bowl, combine warm water and yeast. Let sit for 5 minutes until foamy.
2. In a large bowl, mix flour, sugar, and salt. Add the yeast mixture and olive oil, stirring until a dough forms.
3. Knead the dough on a floured surface for 8–10 minutes until smooth. Place in a greased bowl, cover with a damp cloth, and let rise for 1 hour.

2. Cook the Filling:

1. Heat a skillet over medium heat and cook the ground beef or sausage until browned. Drain any excess fat.
2. Stir in the pizza sauce and simmer for 5 minutes. Set aside.

3. Assemble the Pizza Pie:

1. Preheat the oven to 375°F (190°C).
2. Roll out the dough into a large circle and press it into a greased deep baking dish or springform pan. Trim any excess dough.
3. Layer shredded mozzarella cheese on the crust base. Add the meat filling, mushrooms, and bell peppers. Repeat layers of cheese and fillings as desired.
4. Top with extra mozzarella and garnish with pepperoni slices or additional vegetables.

4. Bake:

1. Bake in the preheated oven for 25–30 minutes, or until the crust is golden brown and the cheese is bubbly.
2. Let the pizza cool slightly before removing from the pan and slicing.

5. Serve and Enjoy:
Slice into portions and serve warm. Pair with a crisp side salad or garlic bread for a complete meal.