When Karuna Rawal got a call from a recruiter about a marketing gig at a startup using a microbe to make protein-packed, animal-free food, she was intrigued. The lifelong vegetarian joined the company, now called Nature's Fynd, as its chief marketing officer and first marketing hire. Now, she and her Chicago-based team are just starting to get the company's name out in the world while preparing to launch its first products next year.