Preheat the oven to 375°.
For the pizza: Slice rolls in half and lay them, cut side up, on a large baking sheet.
Top each half with a generous portion of either marinara or pesto. Next, top with a generous
amount of grated mozzarella and parmesan cheese, if you'd like.
Melt the butter in a large skillet over medium heat. Add the onions and cook, stirring
occasionally, until golden and softened, 8 to 10 minutes. Transfer to a plate.
Add the sausage to the skillet. Cook, breaking up with a wooden spoon, until no longer pink, 6 to
8 minutes.
Top the bread with the onions and sausage. Sprinkle on your choice of optional toppings.
Once all assembled, put the pan in the oven on the lowest rack for 8 to 10 minutes. Crank up the
heat to 425° and put it on the highest rack until the cheese starts to bubble a bit and turn golden,
2 to 3 minutes.
Remove and serve immediately! You can cut the pizzas in half right across the middle so there
are mini French bread pizzas for everyone.