Garlic Butter Flank Steak, Zucchini, and Summer Squash Garlic Butter Flank Steak, Zucchini, and Summer Squash is a quick and tender, low-carb/keto, beef and veggie dish that comes together in about 15 minutes time. Serve this tender and delicious flank steak as is, or over rice, noodles, or mashed potatoes. The choice is yours. For other quick and easy low-carb recipes you'll also... READ:Garlic Butter Flank Steak, Zucchini, and Summer Squash