Prepare all ingredients as described above.
Rinse the quinoa and cook according to the package directions. Season with salt to taste and cover to keep warm.
Heat a grill or griddle pan to medium heat. Drizzle the chicken breast with 1 TBSP olive oil on both sides, then season with paprika, garlic powder, salt, and black pepper. Grill for about 6 minutes per side, or until the chicken reaches 165°F (74°C). Remove from the heat and let rest for 3 minutes before slicing into bite-sized pieces.
Make the sauce: In a blender, combine garlic, cilantro, cumin, olive oil, lemon juice, and Greek yogurt. Blend until smooth, adding a splash of water if needed to adjust consistency. Season with salt and pepper to taste.
Prepare the Korean banana milk: In a blender, combine banana, maple syrup, vanilla extract, milk, water, and ice cubes (if using). Blend until smooth, adjusting sweetness or consistency as desired.
Assemble the Buddha bowl: Portion the cooked quinoa into bowls. Top with grilled chicken, tomato, cucumber, avocado, feta cheese, and red onion. Drizzle with the prepared sauce.
Serve with a side of fresh mango and a glass of Korean banana milk.