Rinse the quinoa thoroughly in a fine mesh strainer under running water to remove bitterness.
Cook the quinoa: Add rinsed quinoa and 2 cups water/stock to a saucepan. Bring to a boil, cover, reduce heat, and simmer for 12–15 minutes until liquid is absorbed. Remove from heat and let it sit covered for 5 minutes. Fluff with a fork.
Sauté the shrimp: Heat olive oil in a non-stick pan over medium heat. Add minced garlic and cook for 30 seconds until fragrant. Add shrimp, season with salt and pepper, and cook for 2–3 minutes per side until pink and opaque.
Add vegetables: Stir in cherry tomatoes and chopped bell pepper. Cook for 2–3 minutes until slightly softened but still fresh.
Combine: In a mixing bowl, add the fluffed quinoa, sautéed shrimp, and vegetables.
Finish: Add diced cucumber, lemon juice, and chopped parsley. Toss gently to combine.
Serve warm as a balanced, high-protein healthy meal.