In large bowl, mix flour, remaining 3/4 teaspoon salt and remaining 1/2 teaspoon pepper. Add beef; toss to coat. Discard any excess flour. In 12-inch skillet, heat 1 tablespoon oil over medium-high heat. Cook half of beef 5 to 7 minutes or until browned on all sides. Transfer to slow cooker; repeat with remaining 1 tablespoon oil and remaining half of beef.