Spray a skillet with cooking oil spray, add oil and tilt to coat. Set over medium-high heat, add garlic and cook about 30 seconds, or until golden and slightly softened. Add kale and toss to coat. Reduce heat to medium and cook about 4 minutes, or until wilted.
Add beans, season with salt and pepper and toss gently. Add broth, reduce heat to low and cook 15 to 20 minutes, or until beans are tender, and kale is soft and mushy and most of the bitterness has cooked away.