Light Pepperoni Pizza Muffins

Step 1: Preparations

1. Preheat the oven to 180 degrees Celsius (350 degrees Fahrenheit). 
2. Prepare a muffin tin by greasing it with oil or using paper liners.

Step 2: Making the batter

1. In a large bowl, mix together the flour, baking powder, salt, and dried herbs (if using). 
2. In another bowl, whisk the egg and yogurt until well combined. 
3. Add the egg and yogurt mixture to the dry ingredients and stir until you have a smooth batter. 
4. Add the pepperoni and mozzarella cheese to the batter and gently mix them in.

Step 3: Baking the muffins

1. Divide half of the batter evenly among the muffin cups, filling them about halfway. 
2. Spoon about half a teaspoon of tomato sauce onto each muffin, on top of the batter. 
3. Top with the remaining batter, filling the muffin cups completely. 
4. Place the muffin tin in the preheated oven and bake for approximately 20-25 minutes, or until the muffins are golden and risen. 
5. To check for doneness, insert a toothpick into the center of a muffin - if it comes out clean, the muffins are ready. 
6. Allow the muffins to cool slightly in the tin, then transfer them to a wire rack to cool completely.

Step 4: Serving

1. Serve the pepperoni pizza muffins warm or at room temperature. 
2. They are great as appetizers for parties or picnics, and can also be a delicious addition to salads or soups. 
3. Serve with additional tomato sauce or your choice of dipping sauce. 
4. Garnish with fresh herbs or grated Parmesan cheese, if desired.

Enjoy your light pepperoni pizza muffins!