Ingredients

• 1 tablespoon olive oil, plus more
• 1 (4-pound) seedless watermelon, rind removed, cut into 1/2"-thick slices
• 1 teaspoon kosher salt, divided
• 4 multicolored heirloom tomatoes, thinly sliced
• 1/2 teaspoon freshly ground black pepper, plus more
• 6 ounces feta, thinly sliced (about 1 1/4 cups)

Instructions

1. Prepare a grill for medium-high heat or heat a grill pan or cast-iron skillet over medium-high; oil grate or pan.
2. Using a 2" diameter ring cutter or thin drinking glass, cut watermelon into circles; you should have 20–22 pieces (reserve scraps for another use). Season watermelon on both sides with 1/2 tsp. salt. Grill watermelon until well charred, about 2 minutes per side. Transfer to a plate and set aside until cool to the touch, about 10 minutes.
3. Meanwhile, toss tomatoes, 1 Tbsp. oil, 1 tsp. salt, and 1/2 tsp. pepper in a large bowl.
4. Layer watermelon, tomato mixture, and cheese in alternating layers on a platter, draining any extra liquid from tomatoes before using. Drizzle with oil, season with pepper, and serve.