Preheat the oven to 475F or 450F convection. Line a baking sheet with parchment paper.
Add the veggies, oil, and ½ teaspoon salt to the baking sheet and toss to coat. Spread out into an even layer and bake for 15 minutes, or until nicely charred in spots. If it’s not browning well, you can broil it on high for a minute to get a nice char.
In a high-speed blender, add the chickpeas, tahini, lemon, soy, salt, garlic, and water (start with 2 tablespoons) and blend until smooth, using a tamper tool to encourage blending. If it isn’t blending easily, then add more water, 1 tablespoon at a time.
In a medium bowl, toss the cucumbers with the lemon juice and remaining ¼ teaspoon salt.
Smear the hummus (about ½-¾ cup) on the bottom of a plate or shallow bowl. Top with veggies, cucumbers, pickled onions, and herbs. Drizzle olive oil over top and freshly grated black pepper. Serve with pita chips or pita bread.