As the Food Hero, she could easily control her taste buds and other senses. So even if she ate an entire fire dragon, it didn't make her complain about the raw taste of it.
Furthermore, her Indestructible Stomach Authority could turn off her sense of taste if she wanted to whenever she devoured a living being.
After killing and devouring a fire dragon, the Food Hero didn't stop there and continued as he dashed toward the army of fire dragons!
When those fire dragons saw the Food Hero's figure dashing towards them, they felt fear well up in their hearts and they subconsciously flew away to evade the Food Hero.
But with their enormous figure, the fire dragons collided with each other when they attempted to evade the Food Hero. Their actions were futile and it even caused them to be nearer and more compact in placement. Because of that, it saved the Food Hero a lot of trouble by killing them one by one.