fillet of beef or steak into ¾-inch cubes

Beef fillet, also known as tenderloin, is the most tender cut of beef, derived from the psoas major muscle located along the spine of the animal. This muscle is minimally exercised during the animal's lifetime, resulting in exceptionally tender meat with fine muscle fibers and minimal connective tissue. Beef fillet is characterized by its lean composition, mild beef flavor, and buttery texture. It lacks significant marbling compared to fattier cuts, making it prized for its tenderness rather than intense flavor. The cut is typically pale to medium red in color and is highly valued in fine dining and classical French cuisine. When cut into ¾-inch cubes, the fillet is prepared for applications requiring uniform pieces that cook quickly and evenly, such as stews, kebabs, or stir-fries.

Beef fillet cubes are used extensively in both classic and contemporary cooking. In European cuisine, they are central to dishes such as beef bourguignon, stroganoff, and fondue, where the tender meat absorbs accompanying sauces while maintaining its structure. Asian cuisines employ similar cubes in stir-fries and hot pot preparations, where quick, high-heat cooking is essential. The uniform ¾-inch cube size ensures even cooking, typically requiring 3-5 minutes of high-heat searing followed by gentle simmering. These cubes are also ideal for kebabs, brochettes, and grilled preparations. The lean nature of fillet means it pairs well with rich sauces, aromatic vegetables, and acidic elements such as wine or vinegar that add depth to the mild beef flavor.