Stuffed Pizza

recipe adapted from this

9" springform cake pan
1.5 t sugar
1 c warm water
1.5 t dry active yeast
1 T olive oil
1/2 t salt
3 c flour (have extra for kneading)

8oz crushed tomatoes
1 T brown sugar
1/2 t garlic powder
1 t olive oil
1/2 t salt
italian seasonings (optional)

8oz shredded mozzarella
8oz shredded provel (I used Imo's brand from the groc store)
12oz bulk italian sausage
turkey pepperoni
jarred sliced mushrooms (drained)
half yellow onion, sliced
1 red bell pepper, chopped

make dough: 
Proof yeast in the sugar/water.
Stir in the olive oil and salt, then slowly mix in the flour.
Beat it down on floured surface, then let rise in an oiled bowl till doubled in size (40-60min).

make sauce:
In saucepan over low heat, combine tomatoes, brown sugar, garlic, oil, salt, seasonings and cover for ~30min.

Preheat oven to 450F.
After dough has risen, beat it on a floured surface.
Divide dough in half, roll one half into a 12" circle and fit into the bottom and sides of ungreased springform cake pan.
Sprinkle dough with cheese, then flatten the sausage patty and place over the cheese. Add in the sauce and the rest of the toppings (sauce can be poured on top of the sealed up pizza instead, but I didn't do it that way).
Roll out the other half of the dough into a 9" circle, place on top of the pizza and seal up the dough edges.
Slice some ventilation holes in the top of the pizza.
Cover edges with foil (to keep from burning) and bake 40-45min. Let it rest a little before eating.

note* I forgot to add in the sauce until after I sealed the thing up (durrr) so I ended up undoing the top dough layer and pouring the sauce on top of the other toppings, then resealed the top dough layer. It still came out fine.
more photos: