It seems that there was a dish that my grandmother had been wanting me to try for a long time. When I told her that it was delicious, she was really happy.
ご質問ありがとうございます。
"It seems that there was a dish that my grandmother had been wanting me to try for a long time"=「ばあちゃんが私にずっと食べさせたかった料理があったみたいで」
"When I told her that it was delicious, she was really happy."=「ばあちゃんにおいしい、と言ったら、とても喜んでいた。」
ご参考に!