These lemon curd muffins are a delightful treat for breakfast or brunch. The moist and tender muffins are filled with a tangy lemon curd, creating a burst of citrus flavor in every bite. To make the muffins, combine flour, sugar, baking powder, salt, milk, vegetable oil, eggs, and lemon zest. Fill muffin liners with the batter and bake until golden brown. Once the muffins have cooled, use a piping bag to fill them with homemade lemon curd. Dust the tops with powdered sugar for an extra touch of sweetness. These lemon curd muffins are perfect for enjoying with a cup of coffee or tea.