My brother Jimmy’s favourite dish growing up was bife com molho de mostarda (beef with mustard sauce), which he’d order at Clube Caiçaras, located in Lagoa, a treasured neighbourhood in Rio. We still visit the club frequently, and now both my kids and I order this dish, which is still served the same way, the sauce drizzled on top of thin slices of steak. While the sauce can be prepared with a variety of proteins, it will really shine when paired with a good-quality,