What is the main ingredient in the Portobello Mushroom Chicken dish?

The main ingredient in the Portobello Mushroom Chicken dish is boneless chicken breast. This dish focuses on the combination of flavor from the grilled portobello mushrooms paired with the tender, juicy chicken breast. The chicken serves as the protein base of the dish, which is complemented by the savory taste and texture of the portobello mushrooms. By highlighting the chicken breast, the dish aligns with Texas Roadhouse's emphasis on quality and well-prepared poultry options, making it a popular choice among guests.