Warm two tablespoons pastured lard and two tablespoons extra virgin olive oil together in a skillet over medium-high heat in a pan. Working in batches if you need to, arrange the cubed bread in a single layer in the hot fat of the pan. Allow it to brown on one side, about 3 minutes, before stirring it and allowing it to brown on the remaining sides. Transfer to a dish lined with a kitchen towel and sprinkle with salt. Allow the croutons to cool completely.
Place garlic, 4 anchovy flets, lemon juice, egg yolk, mustard, 1 cup olive oil, salt and pepper into a blender, and blend until smooth, about 30 seconds. Pour into a salad dressing cruet or mason jar, and store in the refrigerator until it's time to prepare the salad.
Chop the Romain lettuce into bite-sized pieces, add the remaining anchovy filets, parmesan cheese and reserved croutons to the bowl, and toss with salad dressing to coat.