Delicious and Easy Tuna Pasta Recipe: One-Pot Mediterranean Delight

Ingredients One tablespoon olive oil One medium onion diced One red bell pepper diced One yellow bell pepper diced One zucchini diced 2 cloves garlic minced 14 5 ounces canned diced tomatoes undrained teaspoon dried oregano teaspoon red pepper flakes optional Salt and freshly ground black pepper to taste 5 ounces conflaked tuna in water drained Half a cup pitted Kalamata olives halved