Prep Your Vegetables
Start by dicing your large tomatoes, or cutting smaller ones into wedges if you prefer a chunkier bite. Leave the cucumber unpeeled the skin holds nutrients and adds a nice pop of color, plus it saves you a step. Cut it in half lengthwise, then slice.
Peel and thinly slice your red onion. I usually go with about a third of it, but if you're an onion lover, feel free to use the full half. Peel your garlic cloves and either run them through a garlic press or smash and mince them on your cutting board.
Build the Dressing
Grab your large, wide, shallow bowl and combine the olive oil, red wine vinegar, minced garlic, and Italian seasoning. Start with about ¼ teaspoon each of salt and pepper you can always add more later once the flavors develop. Whisk everything together until it looks combined and glossy.
This is also the moment to get creative. Fresh herbs like basil or oregano work beautifully here, and a squeeze of lemon juice brightens the whole thing up. IMO, a little extra lemon juice takes this dressing from good to genuinely craveable.
Marinate (The Step You Cannot Skip)
Add the tomato, cucumber, and onion straight into the bowl with your dressing. Stir well so every piece gets coated. Now comes the hardest part walking away for 30 minutes.
Let the salad sit out at room temperature, stirring occasionally so everything marinates evenly. You can stretch this up to an hour if you want the flavors to really deepen the vegetables will release more juice, the garlic will mellow, and the whole bowl will taste more cohesive. Patience pays off here.
Taste, Adjust, and Serve
Once your 30 minutes are up, give the salad a taste test. Add any extra salt and pepper needed to round out the flavors. If you're serving it over greens, layer the kale or arugula on a plate first, then pile the marinated salad right on top.
Add any optional extras your heart desires extra olives, a sprinkle of red pepper flakes, or some fresh parsley. This salad is forgiving, so don't stress about getting it "perfect."