Heat oven to 425. Bake the pita chips on a rimmed metal baking sheet until warm, about 3 minutes.
Meanwhile, heat the olive oil in a medium-large nonstick skillet over medium heat.
Add the zucchini and cook until almost tender, stirring occasionally.
Add the bell pepper, oregano, and red pepper flakes, then cook for one minute.
Reduce the heat to medium-low, then stir in the artichoke hearts, sun-dried tomato, and Kalamata olives. Cook for another minute, or until hot.
Remove from heat, then stir in the tomatoes. Season with salt and pepper to taste.
Sprinkle the feta over the warm chips, followed by the hummus, spinach, and zucchini mixture.
Top with the basil, lemon juice, and seeds, if using.