Pizza Muffins (with Veggies!)

Name: Pizza Muffins (with Veggies!)
Prep time: 10 min
Cook time: 18 min
Total time: 28 min
Cuisine: American
Ingredients: 1½ cups milk; 1 cup grated carrot; 1 cup shredded mozzarella cheese; ¼ cup grated Parmesan cheese; ¼ cup melted and slightly cooled butter or neutral oil; ¼ cup diced pepperoni, plus 2 tablespoons diced pepperoni ((optional)); 2 eggs, lightly beaten; 1 cup all-purpose flour; ¾ cup whole wheat flour; 1 teaspoon baking powder; ½ teaspoon baking soda; 2½ teaspoons pizza seasoning; ½ teaspoon salt; Marinara or pizza sauce ((warmed for dipping, optional but recommended))