Heirloom Tomato Salad (With Kalamata Olives & Fresh Basil)

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Heirloom Tomato Salad is the perfect easy summer side dish. While the juicy, ripe tomatoes are the star, red onion, briny olives and fresh basil add lots of flavor too.

Overhead view of sliced heirloom tomatoes on platter — Arrange tomatoes on plate.

Overhead view of heirloom tomato salad with basil and kalamata olives — Add onions, basil, and olives.

Marinate: Toss together the onions, olive oil, salt, and pepper in a bowl. Let the mixture sit for 5 to 10 minutes.
Arrange: Slice the tomatoes and arrange them on a serving platter or plate.
Assemble: Pour the olive oil and onion mixture over the tomatoes. Season with salt and pepper, then scatter the basil and olives over the top.

Tomato Salad Variations

Here are a few more ways to make this heirloom tomato salad.

Try different herbs: Almost any herb pairs well with tomatoes. Try fresh oregano, parsley, or dill, or a combination of herbs from your garden.
Add cheese: Shaved Parmesan or sliced fresh mozzarella layered with the tomatoes would be delicious.
Swap the olives for capers: They have a flavor that’s bright and briny at the same time.