Asian Steak Salad with Cucumber and Napa Cabbage

INGREDIENTS

• 1/4 cup fresh lime juice (from 2 limes)
• 1/4 cup unseasoned rice vinegar
• 2 tablespoons vegetable oil, such as safflower
• 1 tablespoon toasted sesame oil
• 1/2 teaspoon crushed red-pepper flakes
• 1 garlic clove, crushed through a press
• 1 pound flank steak
• 1/4 cup soy sauce
• Nonstick cooking spray
• 1/2 head napa cabbage (1 pound), thinly sliced crosswise
• 1 English cucumber, halved lengthwise and thinly sliced on the diagonal
• 1/4 cup coarsely chopped unsalted roasted peanuts