Preheat your oven to 400°F. In a medium bowl, add the shrimp, olive oil, minced garlic, lemon juice, salt, black pepper, and onion powder. Toss until the shrimp are evenly coated. Then, spread the shrimp in a single layer on a baking sheet.
Place the baking sheet in the center of your oven and bake for 8 to 10 minutes, until the shrimp turn pink and opaque. Remove from the oven, garnish with chopped fresh parsley, and serve with lemon wedges.