Ina Garten is actually an eight thousand year old demon-witch who uses (off-camera) the blood and spirit essence of her TV show "guests" to supplement her other, secret herb garden (so that she can continue harvesting the ingredients for her magical elixir which maintains her human facade). The food she serves to guests contains various sedatives and hallucinogens so that after her various glamours/trickery magics fade, they don't really notice the fact that they're actually in a dilapidated barn filled to the brim with eyeless black salamanders & foul witchery. They simply lapse into a food coma (lulled by her soothing voice rattling on about tomatoes or whatever) and never wake up.
She mustn't be trusted.