Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Slice the bell pepper and zucchini into bite-sized pieces and place them on the prepared baking sheet.
Drizzle the vegetables with 0.25 tbsp of olive oil and season with a pinch of the sea salt and black pepper.
Roast the vegetables in the oven for 15-18 minutes until they are tender and slightly caramelized around the edges.
While the vegetables roast, pat the tiger shrimp dry with a paper towel and season evenly with garlic powder, dried oregano, and the remaining salt and pepper.
Heat the remaining 0.25 tbsp of olive oil in a large skillet over medium-high heat.
Add the shrimp to the skillet in a single layer and sear for 2-3 minutes per side until they are pink, firm, and opaque.
In a small bowl, whisk together the non-fat Greek yogurt, lemon juice, and chopped fresh parsley to create a creamy sauce base.
Assemble the bowl by spreading the yogurt mixture at the bottom, then topping with the warm roasted vegetables and the seared tiger shrimp.