Rinse 2 pounds of ripe tomatoes under cool water. Using a small sharp knife, carefully remove the stem and core from the top of each tomato. Cut the tomatoes into bite-sized chunks (about 3/4 inch each) and place them in a large mixing bowl. This should take about 3–5 minutes. The chunks should be fairly uniform in size so they distribute evenly in the salad.

Peel 1 large English cucumber using a vegetable peeler or paring knife, moving from top to bottom. Discard the peels. Cut the peeled cucumber in half lengthwise, then slice each half into half-moons about 1/2 inch thick. Cut the half-moons in half to create roughly dice-shaped pieces. Add the diced cucumber to the bowl with the tomatoes. This should take about 3–4 minutes. Checkpoint: You should have about 3 cups of diced cucumber, roughly equal in volume to your tomato chunks.

Slice 1/2 of a red onion thinly (about 1/8 inch slices), cutting from root to tip to maintain natural layers. Add the sliced onion to the bowl. The thin slices allow the onion flavor to distribute throughout the salad without overwhelming it. This takes about 2 minutes.

Rinse 1/4 cup of fresh basil leaves under cool water and pat dry with a paper towel. Tear or coarsely chop the leaves into bite-sized pieces (about 1/2 inch). Avoid crushing the leaves, as this can cause bruising and discoloration. Add the basil to the bowl. Finely chop 2 tablespoons of fresh parsley and add it as well. This takes about 2 minutes.

In a small mixing bowl, combine 1 minced clove of garlic (about 1 teaspoon), 1/2 teaspoon of Dijon mustard, and 2 tablespoons of red wine vinegar. Stir with a small whisk or fork until the mustard dissolves into the vinegar, about 30 seconds. The mustard helps emulsify the dressing and adds subtle depth.

While whisking continuously, slowly drizzle 3 tablespoons of extra virgin olive oil into the vinegar mixture in a thin, steady stream. This gradual addition is key to creating a smooth, emulsified dressing rather than a separated one. Whisk for about 1 minute total until the dressing becomes creamy and slightly thickened. It should look glossy and well combined.

Add 1/4 teaspoon of sea salt, 1/8 teaspoon of ground black pepper, and 1/4 teaspoon of dried oregano to the dressing. Whisk until evenly distributed, about 20 seconds. If using red pepper flakes for heat, add a small pinch (about 1/16 teaspoon) now and whisk in. Taste the dressing with a clean spoon—it should be tangy, slightly salty, and herbaceous.

Pour the prepared dressing over the vegetables in the large bowl. Using a large wooden spoon or salad servers, gently toss the salad until all vegetables are evenly coated with the dressing, about 1–2 minutes. Be gentle to avoid bruising the tomatoes or herbs. Every piece should glisten with dressing.

Let the salad rest at room temperature for 5–10 minutes before serving. During this time, the vegetables will release some moisture and the flavors will meld together beautifully. This resting period is important—do not skip it. Taste the salad and adjust seasonings: add more salt if bland, more vinegar if it needs brightness, or more oil if it feels too acidic.

Transfer the salad to a serving bowl or individual plates immediately. If serving chilled, refrigerate for up to 1 hour before serving, but no longer, as the vegetables will become too soft and watery. The salad is best enjoyed within 2 hours of assembly.

Checkpoint: Before serving, verify that the dressing is evenly distributed, the vegetables are tender but still crisp, the colors are vibrant, and the aroma is fresh and herbal.