Heat the oven to 350 degrees. Place the muffins onto foil-lined baking sheet. Brush with olive oil and top with the Parmesean cheese. Bake 5-6 minutes. Combine the remaining ingredients and mix well. Mound over the muffin halves. Sprinkle with additional Parmesan cheese and broil for 6-8 minutes or until heated through and cheese is bubbly and beginning to brown.