Heat oven to 350°F.

In 12-inch nonstick skillet, cook sausage over medium heat until no longer pink.

Remove sausage to paper towels, reserving drippings.

Cook onion and bell pepper in drippings until crisp-tender.

In medium bowl, stir Bisquick mix, cornmeal and Parmesan cheese.

Cut in butter, using pastry blender or fork, until crumbly.

Add boiling water; stir vigorously until dough forms.

Spray 10-inch ovenproof skillet with cooking spray.

Press dough on bottom and up side of skillet.

Arrange cheese slices over crust; spread with ⅓ cup of the pizza sauce.

Top with sausage and onion mixture.

Arrange two-thirds of the pepperoni over onion mixture.

Spread remaining ⅓ cup pizza sauce over pepperoni; top with shredded mozzarella cheese and remaining pepperoni.

Bake 30 to 35 minutes or until crust is golden brown.

Let stand 5 minutes.

Garnish with basil.

Serve with additional pizza sauce, heated, if desired.