Rinse the quinoa and cook it according to the package instructions until light and fluffy.
Season the chicken breast with olive oil, garlic, paprika, salt, and black pepper.
Grill the chicken for 6–8 minutes per side or until fully cooked.
Lightly sauté the mixed vegetables in a pan with a little olive oil for 3–4 minutes.
Slice the grilled chicken into strips.
Arrange the cooked quinoa on a serving plate, top with grilled chicken, and add the sautéed vegetables.
Serve warm with a squeeze of fresh lemon juice if desired.