Ingredients
1 small red onion, sliced
3 large or 4 smaller 1-inch-thick slices watermelon
3 tablespoons extra-virgin olive oil
2 tablespoons sherry vinegar
Salt to taste
2 tablespoons chopped fresh mint
2 ounces feta cheese, crumbled
1/4 to 1/2 teaspoon Aleppo pepper or mild chili powder (to taste)
Preparation
Place sliced onion in a bowl and cover with water and 1 teaspoon of the vinegar. Soak 5 minutes, then drain and rinse. Drain on paper towels.
Prepare a medium-hot grill. Use 1 tablespoon of the olive oil to brush the watermelon slices lightly. Grill for about 3 minutes per side, or until charred. Remove from heat and dice. Transfer, with juice, to a large salad bowl.
Add onions and remaining ingredients and toss together. Let sit for a few minutes or for up to an hour before serving. Toss again just before serving.