For a hearty and nutritious Valentine's Day dinner, try grilling chicken with a side of roasted vegetables. Chicken is a lean source of protein, while roasted vegetables like carrots, bell peppers, and zucchini provide essential vitamins and minerals. Marinate the chicken in a mixture of olive oil, garlic, lemon juice, and herbs, then grill until cooked through. Toss the vegetables with olive oil, salt, and pepper, then roast in the oven until tender. Serve the grilled chicken alongside the roasted vegetables for a satisfying and healthy meal that is perfect for a romantic dinner.