potato salad with country ranch dressing

Ingredients

• - 3 pounds round red potatoes, cut into 1 inch pieces
• - one small red onion, cut into wedges, 1/2 cup
• - six cloves garlic, minced
• - 2 tablespoons olive oil
• - 1 cup frozen whole kernel corn
• - 3/4 cup mayonnaise
• - 2 tablespoon cider vinegar
• - one envelope dry ranch salad dressing mix, 1 ounce
• - 1/4 teaspoon cayenne pepper, optional
• - 1/2 cup bias sliced celery, one stalk
• - three hard cooked eggs, peeled and chopped,
• - one avocado, halved, seeded, peeled and chopped, optional
• - salt ,ground black pepper
• - fresh italian flat leaf parsley, coarsely snipped, optional