Step 1) Combine 1-1/2 cups flour, undissolved yeast, sugar, salt and oregano in large mixer bowl.  Add water and oil; beat 2 minutes on  medium speed.  Gradually add remaining 1-1/4 cups flour to make a stiff yet sticky dough.  Stir in pepperoni, green bell pepper, onion and cheese.  Cover bowl and let rest 10 minutes.