Name: Marinated Cucumbers Onions and Tomatoes Recipe
Prep time: 20 min
Total time: 20 min
Ingredients: 3 medium cucumbers, thinly sliced; 1 pint cherry or grape tomatoes, halved; 1 small red onion, very thinly sliced; 2 tablespoons fresh parsley, chopped; 1/4 cup extra virgin olive oil; 1/3 cup red wine vinegar; 1 tablespoon fresh lemon juice; 1 to 1 1/2 tablespoons sugar; 1 teaspoon kosher salt, plus more to taste; 1/2 teaspoon black pepper; 1/2 teaspoon garlic powder; 1/4 teaspoon dried oregano; 1/4 teaspoon dried basil; 1/4 teaspoon crushed red pepper flakes; 1/4 cup crumbled feta or fresh mozzarella pearls; 1 small bell pepper, thinly sliced

Marinated Cucumbers Onions and Tomatoes Recipe tastes crisp, tangy, and a little sweet, with juicy tomatoes and cool cucumbers soaking up a bright vinaigrette. It works perfectly for busy home cooks who want a fresh side dish in about 20 minutes of hands-on time, plus a chill in the fridge. I grew up eating versions of this at every summer cookout, and I still sneak a forkful straight from the bowl while it chills.

Why Marinated Cucumbers Onions and Tomatoes Recipe Is Worth It

This salad hits that perfect balance of crunchy, juicy, and zippy, so it never feels heavy. You get cool cucumber, sweet-tart tomato, and a little bite from onion, all wrapped in a simple vinegar dressing that tastes way fancier than it looks.

You can toss it together with basic pantry staples and whatever tomatoes look best at the store or market. It works with grilled chicken, burgers, sandwiches, or a simple bowl of rice and beans, so you get a lot of mileage from one quick recipe.

“This Marinated Cucumbers Onions and Tomatoes Recipe tastes like summer in a bowl and somehow disappears from the table every single time. ★★★★★”

Ingredients You Need

Fresh produce

3 medium cucumbers, thinly sliced
- Use English or Persian cucumbers for tender skins and fewer seeds.
- If you use standard cucumbers, peel them and scoop out large seeds.
1 pint cherry or grape tomatoes, halved
- You can use 3 to 4 medium tomatoes, chopped, if that is what you have.
1 small red onion, very thinly sliced
- Yellow or sweet onion works if you prefer a milder flavor.
2 tablespoons fresh parsley, chopped
- Fresh dill or basil also taste great in this salad.

Marinade / dressing

1/4 cup extra virgin olive oil
- Any neutral oil works, but olive oil adds nice flavor.
1/3 cup red wine vinegar
- Apple cider vinegar or white wine vinegar both work as swaps.
1 tablespoon fresh lemon juice
- Bottled lemon juice works in a pinch, but fresh tastes brighter.
1 to 1 1/2 tablespoons sugar
- Use honey or agave if you prefer natural sweeteners.
1 teaspoon kosher salt, plus more to taste
1/2 teaspoon black pepper
1/2 teaspoon garlic powder
- You can use 1 small clove fresh garlic, minced, if you like a stronger kick.
1/4 teaspoon dried oregano
1/4 teaspoon dried basil
- Italian seasoning works as a shortcut if you keep it in your pantry.

Optional add ins

1/4 teaspoon crushed red pepper flakes for a little heat
1/4 cup crumbled feta or fresh mozzarella pearls for extra richness
1 small bell pepper, thinly sliced, for extra crunch

Equipment list

Large mixing bowl
Small bowl or jar with lid for the marinade
Sharp chef’s knife
Cutting board
Measuring cups and spoons
Whisk or fork
Plastic wrap or airtight container for chilling and storage
Tongs or large spoon for tossing

Quick Tips & substitutions

Slice the cucumbers and onions very thin so they soak up more marinade.
Salt the cucumber slices lightly and pat them dry if they seem very watery.
Use cherry or grape tomatoes when possible since they hold their shape better.
Swap red wine vinegar with apple cider or white wine vinegar without changing the rest.
Use honey or agave instead of sugar if you avoid refined sugar.
Skip the sugar entirely and add a splash of balsamic vinegar for natural sweetness.
Use fresh herbs when you can, but dried Italian seasoning works as a quick backup.
Add chickpeas or white beans to turn this into a light lunch salad.
Use a jar with a lid to shake the dressing so it blends quickly and stays smooth.
Chill the salad at least 30 minutes so the flavors settle and taste brighter.

How to Make Marinated Cucumbers Onions and Tomatoes Recipe

Step 1: Prep the vegetables

Wash the cucumbers and tomatoes and pat them dry. Slice the cucumbers into thin rounds, about 1/8 inch thick, so they stay crisp but still soak up flavor. Cut the cherry or grape tomatoes in half, or chop larger tomatoes into bite-size chunks.

Peel the red onion and slice it as thin as you comfortably can. If raw onion tastes too strong for you, soak the slices in cold water for 10 minutes, then drain and pat dry. Add the cucumbers, tomatoes, and onion to a large mixing bowl.

Step 2: Mix the marinade

In a small bowl or jar, add the olive oil, red wine vinegar, lemon juice, sugar, salt, pepper, garlic powder, dried oregano, and dried basil. Whisk until the sugar dissolves and the dressing looks smooth and slightly thick. If you use a jar, screw on the lid and shake it like you mean it.

Taste the marinade and adjust the seasoning. Add a pinch more salt if it tastes flat, or a bit more sugar if the vinegar feels too sharp. Stir in red pepper flakes if you want a little heat.

Step 3: Combine and toss

Pour the marinade over the bowl of cucumbers, onions, and tomatoes. Use tongs or a large spoon to toss everything until the vegetables look evenly coated. Make sure the onion slices separate so the dressing reaches every piece.

Sprinkle in the chopped parsley or other fresh herbs and toss again. If you add cheese or beans, fold them in gently so they stay intact. Taste one cucumber slice and adjust salt and pepper as needed.

Step 4: Chill and marinate

Cover the bowl with plastic wrap or transfer everything to an airtight container. Place the salad in the fridge for at least 30 minutes so the flavors blend. If you have time, chill it 2 to 4 hours for deeper flavor.

Give the salad a good toss once or twice during chilling so the marinade coats everything evenly. Right before serving, taste again and add a squeeze of lemon or a pinch of salt if the flavors need a little lift. Serve it cold or at least nicely chilled.

Recipe Variations

Gluten free
- The base recipe already stays gluten free, as long as your vinegar and seasonings list no gluten ingredients.
Vegan
- Keep the salad as written or swap sugar for maple syrup or agave.
- Skip cheese or use a dairy free feta style crumble.
Low carb / keto friendly
- Leave out the sugar and sweeten with a low carb sweetener like stevia or monk fruit.
- Use more cucumbers and fewer tomatoes to lower carbs further.
Extra crunchy version
- Add thinly sliced bell peppers, radishes, or celery.
Herb lover version
- Load it up with fresh dill, basil, and parsley together.
Creamy twist
- Stir in a spoonful of Greek yogurt or sour cream right before serving for a creamy cucumber salad vibe.
Protein boost
- Add grilled chicken strips, canned tuna, or chickpeas to turn it into a full meal.

Ways to Serve Marinated Cucumbers Onions and Tomatoes Recipe

Spoon it next to grilled chicken, steak, or pork chops.
Serve it with burgers, hot dogs, or sausages at a cookout.
Pile it on top of toasted bread or garlic bread as a fresh bruschetta style topping.
Add it to a bowl with rice or quinoa and a protein for a quick lunch.
Serve it alongside scrambled eggs or omelets for a fresh breakfast side.
Use it as a crunchy topping for baked potatoes or sweet potatoes.
Pack it in lunch boxes as a cool, refreshing side dish.

Storage Success

Store leftover Marinated Cucumbers Onions and Tomatoes Recipe in an airtight container in the fridge. The flavors stay bright for about 3 days, though the tomatoes soften a bit after day two. Give the salad a good stir before serving again so the marinade redistributes.

If the cucumbers release extra liquid, you can drain off a little and add a splash of vinegar and pinch of salt to perk it back up. I like to eat it cold straight from the fridge, which feels like a built in snack every time I open the door.