Freshly snipped herbs for garnish (I used a combination of mint, cilantro, and basil, my summer triumvirate!)
Combine the prepared tomatoes, garlic, poblano chili, and sweet onion in a large bowl. Drizzle with the olive oil and add the crushed cumin seed and coriander seed. Season with the lemon zest, Maldon salt, and black pepper.
If using a broiler, line a baking sheet with foil. Pour the tomato mixture over the sheet in an even layer.
Heat your broiler to high. When very hot, slide your baking sheet as close to the broiler as your oven racks allow. Set timer for 8 minutes. Check at this point for softness and a nice, speckled char on most of the vegetables. If you need more time, increase in only 2-minute intervals—once the vegetables are this hot, they go quickly to the next level of blistering.
If you are using a heavy cast-iron skillet on a burner or grill, the principle is the same. Resist the urge to stir the vegetables too much while they are blistering—turning them over once with a spatula at the 6- to 8-minute mark is a good idea.
Let the vegetables cool to room temperature. Roughly chop with a knife— not a food processor or blender. You want a reasonably chunky relish here. Dress with the honey, lime juice, and freshly snipped herbs. Taste again for seasoning with salt and pepper.