Preheat your oven to 375°F (190°C).
Lightly grease a muffin tin with cooking spray.
Unroll the crescent roll dough and separate it into triangles.
Press each triangle into the muffin tin, forming a cup.
Add a spoonful of pizza sauce into each dough cup.
Sprinkle shredded mozzarella cheese over the sauce.
Layer the pepperoni slices, diced bell peppers, and black olives on top of the cheese.
Sprinkle Italian seasoning over the toppings.
Bake for 12-15 minutes until the crust is golden brown.
Allow the pizzas to cool for a few minutes before serving.