Combine yeast and sugar with warm water and allow to sit for 5-10 minutes until bubbly.
Add flour, salt, and oil to yeast mixture
Combine wet ingredients in dry ingredients into mixer and knead for 5 minutes until dough is smooth, will be a little sticky. Allow to rise for at least one hour.
Divide dough into 4-6 pieces. Depending on the size of calzone you'd like.
Roll dough into circle.
Layer with toppings - tomato, basil leaves and mozzarella cheese on half of the circle
Pull other half of circle over the top of filling and seal the edges of the dough closed.
Bake at 450 until golden brown - about 12-15 minutes.
Notes
Other Filling Ideas:
Cheese. Mozzarella, Monterey Jack, Cheddar and Parmesan all work well.
Sauce. I use my favorite pizza sauce or with a Margherita calzone I just use slices of tomato. You could also use a pesto or an Alfredo sauce. Use extra sauce for dipping it into after it's baked.
Meat. Pepperoni, Sausage, Canadian Bacon, Prosciutto, Bacon, Chicken.