1. Preheat the Oven: Set your oven to 360°F and grease a muffin tray (or use a silicone muffin tray with cooking spray) to prepare for baking.

2. Mix the Dry Ingredients: In a large bowl, whisk together the flour, baking powder, salt, and dried Italian herbs. This ensures the seasoning is evenly distributed throughout the muffins.

3. Combine the Wet Ingredients: In a separate bowl or jug, whisk together the tomato purée, olive oil, and egg. This creates the moist and flavorful base for the muffins.

4. Bring It All Together: Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix, as this can result in tough, dense muffins.

5. Fold in the Toppings: Gently fold in the grated cheese, diced ham (or your preferred pizza toppings), and baby spinach (if using). This ensures the toppings are evenly distributed throughout the muffin batter.

6. Fill the Muffin Tray: Scoop the batter into the greased muffin cup, filling them evenly to ensure uniform baking.

7. Bake to Perfection: Place the muffin tray in the preheated oven and bake for 15-20 minutes, or until the Pizza Muffins are cooked through and golden on top.

8. Serve and Enjoy: Allow the Pizza Muffins to cool slightly, then serve them warm or at room temperature. These versatile treats are perfect for lunch boxes, snacks, or a casual meal.