Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
In a large mixing bowl, toss the cubed eggplant, sliced zucchini, and chopped red bell pepper with half of the olive oil, sea salt, and black pepper.
Spread the vegetables in a single layer on the prepared baking sheet and roast for 18 minutes until they begin to soften and brown slightly.
While the vegetables roast, toss the peeled and deveined shrimp in the same mixing bowl with the remaining olive oil, garlic powder, and dried oregano.
Remove the baking sheet from the oven, add the seasoned shrimp, and toss gently with the vegetables.
Return the pan to the oven and roast for an additional 5 to 7 minutes until the shrimp are pink and opaque.
Drizzle the tomato puree and lemon juice over the hot mixture, tossing once more to coat everything in the zesty sauce.
Garnish with freshly chopped parsley before serving warm.