Combine flour, dry yeast, and salt in a bowl.
Add olive oil and lukewarm water to the dry ingredients and knead into a smooth dough for 5 to 8 minutes.
Cover the dough and let it rise for 1 hour until it doubles in size.
Heat olive oil in a pan over medium heat, then add minced garlic and cook briefly.
Stir in crushed tomatoes, oregano, salt, and pepper, then simmer the sauce for 10 minutes until slightly thickened.
Preheat the oven to 220°C (430°F).
Divide the dough into two portions and roll each into a thin round or rectangle shape.
Place the rolled dough on a baking tray or pizza stone.
Spread the tomato sauce evenly over each dough base.
Sprinkle shredded mozzarella cheese over the sauce.
Top the pizzas with sliced mushrooms.
Bake in the preheated oven for 12 to 15 minutes until the crust is golden and the cheese is melted.
Slice and serve the pizzas hot.