Preheat the oven to 425ºF and adjust the rack to the middle position. Place the green beans and tomatoes in a large baking dish. Add the ghee and sea salt and toss to combine. Roast vegetables for 15-20 minutes, until the skins on the tomatoes begin to burst and the green beans are just becoming golden brown on the edges.
Preheat a grill pan or grill over medium-high heat. Season both sides of the steaks with sea salt. Grill 2-3 minutes per side until medium-rare (or to your desired doneness). Place steaks on a plate and let rest for 10 minutes.
Place the shallot, garlic, red wine vinegar, olive oil, basil and sea salt in a blender and blend until smooth.
Cut the steaks, against the grain, into strips and serve with vegetables and basil vinaigrette.