Mix bread crumbs, Parmesan cheese, 3 teaspoons of the basil, 1 teaspoon of the garlic powder and pepper in shallow dish. Moisten chicken lightly with milk. Coat evenly with bread crumb mixture.
Heat 1 tablespoon of the oil in large nonstick skillet on medium heat. Cook chicken in batches 2 to 3 minutes per side or until golden brown and cooked through. Transfer chicken to serving platter.
Meanwhile, mix remaining 4 tablespoons oil, lemon juice, sugar, remaining 1 teaspoon basil and 1/2 teaspoon garlic powder in small bowl with wire whisk until well blended. Drizzle dressing over spinach; toss to coat well. Serve chicken with spinach salad.