01 - Preheat oven to 425°F. Place red bell pepper halves cut side down on a lined baking sheet. Roast for 20-25 minutes until skins are blistered and charred. Remove from oven, cool slightly, peel skins, and slice into strips.
02 - Combine quinoa, water, and 1/2 tsp salt in a saucepan. Bring to a boil over high heat, reduce to low, cover, and simmer for 15 minutes until water is absorbed. Remove from heat and let stand covered for 5 minutes. Fluff with a fork.
03 - In a small bowl, whisk together olive oil, lemon juice, red wine vinegar, minced garlic, dried oregano, salt, and black pepper until emulsified.
04 - In a large bowl, combine cooked quinoa, cherry tomatoes, cucumber, spinach, red onion, and roasted red pepper strips. Drizzle with dressing and toss gently to coat evenly.
05 - Divide mixture among four bowls. Top each portion with crumbled feta cheese, sunflower seeds, and fresh parsley. Serve immediately or refrigerate for a cold grain bowl.