Potato Salad With Indian Spices

Ingredients

• 2 1/2 lb. large potatoes
• 1 tsp. salt
• 1 medium sweet potato
• 1 1/2 tsp. cumin seed
• 2 Tbsp. fresh chopped dill
• 2 Tbsp. fresh chopped spearmint
• 1 Tbsp. fresh lime juice
• 1 1/2 tsp. finely grated fresh ginger
• 1 jalapeno chile (pepper), minced
• 1 garlic clove, minced
• 1 tsp. mustard
• 1 tsp. finely grated lime zest
• 1/2 c. mayonnaise
• 1/2 c. buttermilk
• 3/4 tsp. freshly ground pepper
• 1 medium onion, finely chopped
• 6 radishes, cut into thin sticks