Flank Steak

Ingredients

• 1/4 cup extra-virgin olive oil
• 1/4 cup soy sauce
• 1/4 cup fresh lemon juice (from 2 lemons)
• 2 tablespoons packed light-brown sugar
• 2 cloves garlic, smashed
• 1 1/2 pounds flank steak
• 1/2 bunch arugula (about 2 ounces), leaves torn if large
• Coarse salt and freshly ground pepper
• Lemon wedges, for serving