In a bowl, mix giardiniera, artichoke hearts (including marinade), mushrooms, olives, tomato sauce, tuna, and vinegar. Cover and chill to blend flavors, at least 12 hours, or up to 2 days. Add salt and pepper to taste.
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.