Preheat oven to 350F. Clean mushrooms, and remove stems with spoon. Line a baking sheet with parchment paper. Bake mushroom caps for 8-10 minutes to dry out.
To a large nonstick skillet, over medium high heat, spray cooking spray or olive oil, and add sausage. Break up into small pieces with a spatula. Add in spices. Cook in skillet until pork is cooked, no longer pink. About 8-10 minutes. Mix in pizza sauce.
Remove mushroom caps from oven. Add sausage mixture to each cap. Top with cheese (about ¼ cup per mushroom). Bake 5 minutes, or until cheese melts. Top with fresh basil, if desired.