Ingredients

• 2 (6 ounce) cans tuna in water, well drained
• 4 medium tomatoes
• 1/4 cup green pepper, finely chopped
• 1/4 cup red pepper, finely chopped
• 1/3 cup pistachios, coarsely chopped
• 1 1/2 tablespoons capers, well drained
• 1/3 cup parmesan cheese, grated
• 1/8 cup purple onion, finely chopped
• 1 1/2 teaspoons parsley flakes
• 1/8 cup olive oil
• 4 tablespoons balsamic vinegar
• 1/2 teaspoon onion powder
• 1/2 teaspoon basil
• 1/2 teaspoon black pepper
• 1 1/2 teaspoons sugar
• 1 garlic clove
• 1/4 teaspoon rosemary