Melt the butter in a medium skillet over medium heat. Add the breadcrumbs, 1/2 teaspoon salt and a bunch of grinds of pepper (about 20 grinds) and cook, stirring constantly, until the crumbs are golden brown, about 5 minutes. It's important to stir the whole time to make sure that they do not burn--which will happen if they sit too long in the skillet untouched. Once golden, immediately transfer them to a plate to cool and stop the cooking process. Set aside.
Whisk the yogurt, mustard, Worcestershire, lemon zest and juice, garlic, 3 tablespoons water, 1/2 teaspoon salt and about 20 grinds of black pepper in a small bowl until smooth, creamy and combined.
And add the romaine to a serving bowl. Sprinkle in 3/4 cup of the breadcrumbs, 3/4 cup of the Parmesan and the dressing and toss until the lettuce is nicely coated. Sprinkle the remaining breadcrumbs and Parmesan on top and serve immediately.