Spanish-Style Tuna Salad - Type 2 Nation

Ingredients

• 2 tablespoons cider vinegar
• 1 tablespoon canola oil
• 1½ teaspoons minced garlic
• 1 orange
• 1 6-ounce can albacore tuna packed in water, drained
• ¾ cup thinly sliced cucumber
• ¼ medium red onion, thinly sliced (½ cup)
• 2 tablespoons chopped, pitted olives (optional)
• 1⁄8 teaspoon crushed red pepper
• 3 cups torn bibb lettuce or mixed salad greens
• 2 teaspoons chopped walnuts, toasted