Place muffin halves, cut side up, on a large baking sheet. Broil 3 minutes or until lightly toasted.
Preheat oven to 425°.
Spread about 2 teaspoons cream cheese over each muffin half. Divide Canadian bacon, green onions, and pineapple tidbits evenly among muffin halves; sprinkle each with 2 tablespoons pizza cheese. Bake at 425° for 8 minutes or until pizza cheese melts.