Let steaks rest to take the chill off. Preheat the grill or a grill pan or large skillet to medium high to high heat.
Chop garlic, then finely chop herbs and mix together. Add lemon zest over the herb mixture and toss to combine. Add grill seasoning or salt and pepper to the pile and combine. Drizzle steaks with extra-virgin olive oil and rub liberally with herb mixture on all sides.
Bring a few inches of water to a boil in a medium pan. Peel and slice beets 1/2 to 3/4-inch thick. Simmer beets until just tender, 6 to 7 minutes. Drain beets, cold shock them. Pat beets dry. Trim and slice the fennel into 1/2-inch thick pieces.
Combine greens in a large shallow bowl or platter.
Spray grill or grill pan with cooking spray. Grill beets, fennel and steaks 2 minutes on each side until evenly marked. Meat should still be pink inside. Allow meat to rest a few minutes.
Whisk together the scallions, lemon juice, mustard, cumin, vinegar and stream in extra-virgin olive oil. Dress and season the salad greens. Slice the veggies and scatter over salad. Crumble cheese and arrange over vegetables. Serve salad, slice steak very thin on an angle and arrange meat over individual portions of salad and veggies.