First, slice the chicken breast and pound thin.
Next, whisk eggs, milk, garlic powder, onion powder, and pepper in a bowl. Add breadcrumbs to another bowl.
Dip each chicken cutlet into the egg wash, then into the breadcrumbs, pressing firmly.
Meanwhile, make the dressing by blending mayo, garlic, anchovies, Dijon, lemon juice, Parmesan, and pepper until smooth.
After that, toss chopped romaine with 1 cup of dressing and set aside.
In a large skillet, heat avocado oil and fry chicken 3–4 minutes per side until golden and cooked through. Drain on a wire rack.
While the chicken rests, slice and butter croissants, then toast butter side down in a skillet until golden.
To assemble, layer dressed romaine, crispy chicken, and the top half of the croissant.
Finally, brush the tops with melted butter mixed with garlic powder, Parmesan, and parsley. Serve immediately.