Marinated Cucumber, Tomato, and Onion Salad

Marinated Cucumber, Tomato, and Onion Salad is a classic summer side dish that is crisp, refreshing, and full of tangy flavor. It’s the perfect addition to barbecues, picnics, or simple weeknight dinners. This dish is made with fresh cucumbers, juicy tomatoes, and sharp onions, all soaked in a well-balanced marinade that enhances their natural flavors. With just a handful of ingredients and minimal prep time, you’ll have a delicious and healthy salad that gets better the longer it sits.

Why You’ll Love This Salad

This salad is a staple in Southern and country-style cooking, but it’s enjoyed worldwide for its simplicity and bold flavors. The vinegar-based marinade adds a bright, zesty punch, while a touch of sugar balances out the acidity. It’s light, hydrating, and packed with nutrients, making it a great choice for those looking for a healthy yet flavorful dish.

• Quick and Easy – Made with simple ingredients in under 15 minutes.
• Make-Ahead Friendly – Tastes even better after marinating for a few hours.
• Versatile – Works as a side dish, topping, or even a light lunch.
• Low-Calorie and Healthy – Full of fresh vegetables, antioxidants, and hydration.

Ingredients

• 2 large cucumbers, thinly sliced
• 3 medium tomatoes, cut into wedges or thick slices
• 1 medium red onion, thinly sliced
• 1/4 cup apple cider vinegar (or white vinegar)
• 1/4 cup olive oil (or vegetable oil)
• 1 tablespoon sugar (adjust to taste)
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/2 teaspoon garlic powder
• 1/2 teaspoon dried oregano or Italian seasoning
• 1/4 teaspoon crushed red pepper flakes (optional for a slight kick)
• 1 tablespoon chopped fresh parsley or basil for garnish

Instructions

1. Prepare the Vegetables: Wash and slice the cucumbers into thin rounds. Cut the tomatoes into wedges or thick slices, depending on your preference. Slice the red onion thinly for a milder taste. Place everything into a large mixing bowl.
2. Make the Marinade: In a separate small bowl, whisk together apple cider vinegar, olive oil, sugar, salt, black pepper, garlic powder, oregano, and red pepper flakes until the sugar dissolves and everything is well combined.
3. Combine and Marinate: Pour the marinade over the cucumber, tomato, and onion mixture. Toss everything together until well coated. Cover the bowl with plastic wrap and refrigerate for at least 1 hour to allow the flavors to meld. For the best taste, marinate for 4 hours or overnight.
4. Serve and Enjoy: Before serving, give the salad another good toss and garnish with fresh parsley or basil. Serve chilled as a refreshing side dish to grilled meats, sandwiches, or even alongside a bowl of soup.

Cooking Notes and Tips

• Best Cucumbers to Use: English cucumbers work best because they have thinner skin and fewer seeds, making them crispier. If using regular cucumbers, consider peeling them and scooping out some seeds to avoid excess moisture.
• Sweeter Flavor: If you prefer a sweeter dressing, increase the sugar slightly or drizzle in a little honey.
• More Acidity: If you enjoy a sharper tang, increase the vinegar by an extra tablespoon.
• Storage: This salad can be stored in an airtight container in the refrigerator for up to 3 days. The longer it sits, the more flavorful it becomes.

Variations

This salad is highly adaptable, and you can easily add more ingredients to enhance the flavor profile:

• Mediterranean Twist: Add crumbled feta cheese, black olives, and fresh oregano for a Greek-inspired version.
• Creamy Version: Stir in a couple of tablespoons of sour cream or Greek yogurt before serving for a creamy, tangy twist.
• Protein-Packed Option: Toss in chickpeas or diced grilled chicken to turn it into a light meal.
• Spicy Variation: Add diced jalapeños or a dash of hot sauce to bring some heat.
• Lemon Herb Dressing: Replace the vinegar with fresh lemon juice and add a sprinkle of fresh dill for a zesty and herbaceous flavor.

Keto and Low-Carb Version

This salad is already a great choice for those on a low-carb or keto diet, but to make it even more keto-friendly:

• Sugar-Free Swap: Use a keto-friendly sweetener like monk fruit or erythritol instead of sugar.
• Healthy Fats: Swap out vegetable oil for avocado oil or extra virgin olive oil for added health benefits.
• Increase the Fat Content: Add crumbled feta or sliced avocado for a more satiating dish.

What to Serve With Marinated Cucumber, Tomato, and Onion Salad

This salad pairs wonderfully with a variety of dishes:

• Grilled Meats: Serve alongside grilled chicken, steak, or fish for a refreshing contrast.
• BBQ Favorites: Complements smoked ribs, pulled pork, or brisket.
• Sandwiches and Burgers: Works as a fresh topping or side dish for burgers, subs, or wraps.
• Mediterranean Meals: Pairs well with hummus, pita bread, or kebabs.
• Light Lunch Option: Serve over a bed of mixed greens with a side of crusty bread.

FAQs

Can I make this salad ahead of time?
Yes! In fact, it tastes even better after marinating for a few hours or overnight. The vegetables absorb the dressing, making the flavors more intense.

What type of vinegar works best?
Apple cider vinegar adds a mild sweetness, while white vinegar gives a sharper taste. Red wine vinegar can also be used for a more Mediterranean-inspired flavor.

Can I use cherry or grape tomatoes?
Absolutely! Halved cherry or grape tomatoes work just as well and add a burst of sweetness.

How do I reduce the onion’s strong flavor?
If raw onions are too strong for your taste, soak them in cold water for 10-15 minutes before adding them to the salad. This helps mellow their sharpness.

How long does this salad last?
It stays fresh for up to 3 days in the refrigerator. Just give it a good toss before serving to redistribute the marinade.