Cut meat into 4 portions and pound pieces between plastic to 1/8- to 1/4-inch thick. Pat dry and season with salt and pepper.
Heat a large cast-iron or nonstick skillet over medium-high heat.
Brown and crisp beef 2-3 minutes on each side in 2 batches. Caramelize the cut side of 1 halved alongside the second batch of meat. Rest meat 5 minutes.
Whisk up grated or pasted garlic, the juice of 1 lemon, the Dijon, EVOO, salt and pepper. Toss greens, herbs and cheese with dressing.
Dress beef with juice from the caramelized lemon and top with salad to serve.