Mustard-Peppercorn Steak and Arugula Salad | Williams Sonoma

Ingredients

• 2 tsp. peppercorns
• 1 tsp. mustard seeds
• 1 Tbs. minced fresh rosemary
• 2 tsp. coarse kosher salt
• 1 1/4 lb. top sirloin steak, about 1 inch thick
• Olive oil as needed
• 1/2 cup balsamic vinegar
• 1/4 cup minced shallots
• 1 tsp. firmly packed brown sugar
• 6 cups arugula
• 1/4 red onion, thinly sliced
• 1/2 bunch radishes, thinly sliced
• 1/2 lemon