Roasted spring vegetables with spicy Italian sausage

Ingredients

• 3/4 lb thin skinned potatoes such as red, purple, or white potatoes cut into bite sized pieces
• 1 small red onion
• 1/3 C olive oil
• 1/4 C white wine vinegar
• 3 zucchini or yellow summer squash, cut into bite-sized pieces
• 1 pint cherry tomatoes
• 1 lb green beans, trimmed
• 1/4 C olive oil
• 1 lb spicy Italian sausages
• Parsley, chopped
• Salt and pepper