4. Step
Wipe out the pan and add the remaining 1 tablespoon oil. Add onion and cook, stirring occasionally, for 2 minutes. Add sliced garlic and cook for 30 seconds, then add the broccoli and green beans. Cook, stirring occasionally, for 2 minutes. Stir in kale and add the remaining 2 tablespoons water. Cover and steam until the vegetables are tender-crisp, 1 to 2 minutes.