Flat-Iron Steak Salad with Mustard-Anchovy Dressing

To marinate steaks: Combine 3 tablespoons oil, minced garlic, thyme, sage, salt and 1 teaspoon pepper in a gallon-size sealable plastic bag. Add steaks and turn the bag several times to coat them. Let the steaks marinate for 1 hour at room temperature or refrigerate for up to 1 day.

To prepare dressing: Place vinegar, mustard, anchovy, garlic clove and 1/2 teaspoon pepper in a mini food processor (or blender) and process until smooth, scraping down the sides with a rubber spatula as needed. Add 1/4 cup oil and process until creamy. Set aside for up to 1 hour or refrigerate for up to 1 day.

To cook steaks: Heat a ridged grill pan over medium-high heat until hot or preheat a grill to medium-high.

Remove the steaks from the marinade. (Discard marinade.) Grill the steaks (two at a time, if using a grill pan) until browned on both sides and an instant-read thermometer inserted into the center registers 125 degrees to 130 degrees F for medium-rare, 2 to 4 minutes per side. Transfer to a clean cutting board.

To finish the salad: Toss frisee (or endive) with the dressing in a large bowl. Divide among 6 plates. Slice the steak diagonally across the grain into 1/4-inch-thick slices. Top the salads with the steak and sprinkle with blue cheese.