Mix 1 cup of flour, yeast, sugar and salt in a medium-sized bowl. Add water and oil and stir until well-blended. The dough will be very sticky at this point, start adding more flour to the dough until it forms a soft ball (will be slightly sticky). Knead the dough on a floured surface (for about 4 minutes), adding more flour if it starts to feel sticky.
Roll the dough out on a floured surface, until it is large enough to fit in 12 inch circular pan; place on the greased pan.
Drizzle dough with olive oil (a couple of tablespoons will do). Spread with tomato sauce and sprinkle with a little oregano and garlic powder. Top with mozzarella slices.
Bake pizza for 12 to 15 minutes or until cheese is bubbly and crust is a golden brown.