Can I make this salad ahead of time?
Yes, prepare the dressing and chop cucumbers and chives separately up to 4 hours ahead. Toss everything together just before serving to keep the crispy fried onions from softening.
Why smash the cucumbers instead of slicing them?
Smashing releases water and creates a rough texture that helps the creamy dressing coat evenly, similar to how the dish captures that French onion soup creaminess.
Can I use regular yogurt instead of Greek yogurt?
Greek yogurt adds tanginess and body; regular yogurt will make the dressing thinner. Use 3/4 cup regular yogurt plus 2 tbsp sour cream to match the consistency.
What if I don't have dry onion soup mix?
Blend 1 tbsp caramelized or sautéed onions with 1/2 tsp salt, 1/4 tsp garlic powder, 1/4 tsp black pepper, and a pinch of thyme as a substitute.
How long does this salad keep?
Store in an airtight container for up to 2 days; add crispy fried onions fresh just before serving to maintain crunch.