Add steak, coconut aminos, olive oil, Worcestershire sauce, garlic, salt, and pepper to a shallow dish or large ziplock bag. Toss to coat, transfer to fridge and let marinate for a few hours.
Preheat grill or grill pan to high heat (500-550 degrees), and make sure grates are well oiled. Remove steak from fridge and allow to come to room temperature while grill is heating.
Meanwhile, in a small bowl whisk together olive oil, juice and zest of lemon, garlic, salt and pepper; set aside.
When grill is heated to desired temperature, add skirt steak and cook for 2-3 minutes, flip and cook another 2-3 minutes. Timing depends on desired doneness and temperature of grill. I like mine medium rare and took it off the grill when the internal temp read 125 degrees.
Remove steak from grill and wrap in foil to let rest for 5-10 minutes. Then, place onto cutting board and cut against the grain into thin strips.
Divide arugula and tomatoes evenly among 4 plates and drizzle with lemon vinaigrette. Top with steak and cheese. Serve with slices of toasted baguette and enjoy!!