AUSTIN, Texas — Whole Foods Market here launched Secret Ingredient yesterday, a weekly online cooking show for home cooks seeking tips and simple recipe ideas. The first episode featured Thai-inspired fish tacos made with farm-raised catfish. “Because we focus on only one ingredient per episode, viewers really get to know the featured item and take away practical cooking tips and recipes,” said Scott Simons, host of Secret Ingredient, in a statement. “Top that off with easy yet tasty meal solutions and Secret Ingredient is a home cooks’ treasure.” The video podcast will be available on iTunes and You Tube. Recipes featuring items like the world’s first nitrate-free prosciutto, award-winning aged Balsamic vinegar, fresh artisan-made goat cheese and hand-selected Parmigiano Reggiano will be featured in future programs, according to Whole Foods.