Skirt Steak with Preserved Lemon Butter and Sesame Cauliflower

Name: Skirt Steak with Preserved Lemon Butter and Sesame Cauliflower
Ingredients: ½ preserved lemon, seeded, finely chopped; 4 tablespoons (½ stick) unsalted butter, room temperature; 2 teaspoons thyme leaves; ½ teaspoon finely grated lemon zest; Kosher salt, freshly ground pepper; 1 medium head of cauliflower, cut into florets; 4 tablespoons olive oil, divided; 1 garlic clove, grated; 2 tablespoons fresh lemon juice; 2 tablespoons toasted sesame seeds, chopped; 1½ pounds skirt steak, cut into 4 pieces; ¼ cup chopped parsley