Preheat oven to 350F. Cut chicken into small, bite-sized pieces. In a large skillet heat butter, add onion, garlic and mushrooms.
Cook until onion is transparent and garlic is soft. Add chicken and continue cooking until chicken is done. Spoon mixture over pizza crust and sprinkle chilies over mixture. Top with cheese and bake at 350F until cheese is hot. Let cool 5 minutes before cutting.
Cajun Country -- New Iberia, Louisiana