"This is the perfect starter for a summer dinner or a lunch meal. It's cool and tangy with a whole lot of great grilled flavor. If you like a little more spice, just add more jalapenos. —George Levinthal, Goleta, California..."
INGREDIENTS
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2 tablespoons olive oil, divided
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1/4 seedless watermelon, cut into three 1-1/2-in.-thick slices
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1 large beefsteak tomato, halved
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1/2 English cucumber, peeled and halved lengthwise
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1 jalapeno pepper, seeded and halved lengthwise
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1/4 cup plus 2 tablespoons diced red onion, divided
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2 tablespoons sherry vinegar
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1 tablespoon lime juice
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1/2 teaspoon kosher or sea salt
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1/4 teaspoon pepper
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1 small ripe avocado, peeled, pitted and diced