Textbook vs Real
Textbook이 음식이 맛있습니다i eum-si-gi ma-sit-seum-ni-da
Real이거 미쳤다i-geo mi-chyeot-da
Why Koreans say it this way
맛있다 is correct but boring. 미쳤다 (literally: insane) is the go-to real reaction when food is amazing. You'll hear this in every K-drama eating scene.
Situation: food