Ingredients

• 4 cups baby spinach leaves
• 1/4 sweet onion sliced
• 1 avocado chopped
• 15 pitted black olives
• 2 tablespoons wine vinegar
• 1 tablespoon Dijon mustard
• 1/4 teaspoon granulated sugar
• 2 tablespoons orange juice
• 2 tablespoons vegetable oil
• 1 tablespoon fresh basil chopped
• 1 can tuna drained and broken into chunks