Italian Potato Salad

Ingredients

• 2 lbs red potatoes, scrubbed and cubed
• 8 oz. carrots, sliced
• 8 oz. snap beans, trimmed
• 2 zucchini, cubed
• 1 summer squash, cubed
• 1 bunch scallions, chopped
• 6 leaves radicchio
• 1 Tbsp. olive oil
• 1 clove garlic, minced
• ½ tsp. lemon zest
• ¼ cup red-wine vinegar
• 1 Tbsp. water
• ½ tsp. salt
• ¼ tsp. pepper