Three Bean Salad With Corn

Ingredients

• 1 (15 ounce) can kidney beans, drained
• 1 (15 ounce) can wax beans, drained
• 1 (15 ounce) can cut green beans, drained
• 1 (15 ounce) can garbanzo beans, drained
• 1 (15.25 ounce) can whole kernel corn, drained
• 1 (4.5 ounce) can sliced mushrooms, drained
• 1 onion, chopped
• 1 green bell pepper, cubed
• 1/2 cup cider vinegar
• 1/2 cup white sugar
• 1/4 cup vegetable oil
• 1/2 teaspoon ground black pepper
• 1/4 teaspoon salt
• 1/4 teaspoon dried basil
• 1/4 teaspoon dried oregano
• 1/4 cup white sugar, or more to taste (optional)