Spray a large, non-stick skillet with non-fat cooking spray and set over medium-high heat.

Add in garlic and shallots and sauté until they just begin to become tender, about 3 minutes.

Add in kale and vegetable stock, cover, and lower heat to medium.

Cook till kale is wilted (but not too soft) and still bright green, about 5 minutes or so. Then uncover, and toss around while the excess stock cooks off, about another minute or so.

Add in lemon juice, and season with salt and red pepper flakes. Serve immediately.