Begin by preheating your oven to 375°F (190°C).
On a floured surface, roll out the whole wheat pizza dough into a large rectangle, about 1/4-inch thick.
With a pastry brush, gently brush the top surface of the dough with one tablespoon of olive oil.
Evenly spread the tomato sauce over the dough, leaving a small border around the edges.
Sprinkle the mozzarella cheese across the sauce-laden dough.
Top with finely chopped bell peppers, red onions, and thin mushroom slices.
Season with salt and freshly ground black pepper.
Starting from one of the shorter edges, carefully roll the dough into a tight log.
Using a sharp knife, cut the roll into 1-inch wide Low-Calorie Pizza Rolls.
Place the rolls on a baking sheet, leaving space between each.
Brush the tops with the remaining tablespoon of olive oil.
Bake in the preheated oven for about 20-25 minutes or until the Low-Calorie Pizza Rolls turn golden brown and the cheese is bubbly and slightly caramelized.
Remove from the oven and let cool for a couple of minutes before serving.