Compound butters are a great way to add a boost of flavor to any dish and this one is no exception. Here, earthy chipotle peppers in adobo sauce are blended with butter to provide a sweet gentle heat that pairs well with the steak and the vegetables.
Preheat the oven to 450˚ F. Toss the onion and zucchini with 1 tablespoon olive oil on a rimmed baking sheet. Season with salt and pepper. Roast until tender and browned, 15 to 18 minutes.
Meanwhile, mix the butter, chipotle and adobo sauce in a small bowl until well blended; set aside. Season both sides of the steaks with the adobo seasoning. Heat the remaining 1 tablespoon olive oil in a large heavy skillet over medium-high heat. Add the steaks and cook until browned, about 4 minutes per side for medium doneness. Transfer to a cutting board and let rest 3 minutes.
Divide the onion and zucchini among plates. Top with the cheese and cilantro. Slice the steak and add to the plates. Top with the chipotle butter and serve with lime wedges.