ご飯は

As for the meal or food…, As for cooked rice

→ 御飯
phrase Rare #24,863
As for the meal or food… ご飯 refers here to a meal or food in general; は marks it as the topic.
JA: ご飯はもう食べた?
EN: Have you eaten yet?

明日のご飯は、カレーライスだ。

Tomorrow's meal is curry and rice.

トムは、こんなにおいしいご飯は食べたことがない、と言った。

Tom said he had never eaten food this delicious.

ご飯は食べた?

Have you eaten?

トムは、こんなにおいしいご飯はこれが初めてだ、と言った。

Tom said that he had never had such delicious food before.

ご飯はもう食べた?

Have you eaten yet?

— 親切なクムジャさん (2005)

phrase Rare #35,312
As for cooked rice Here, ご飯 means cooked rice eaten as food, not a meal in general.
JA: ご飯はうまい。
EN: Cooked rice is delicious.

ご飯は残ってるの?

Is there any rice left?

ご飯は太るから、食べ過ぎないようにね!

Rice is fattening, so try not to eat too much!

やっぱり白いご飯はおかわり!

Actually, I’ll have another serving of white rice!

— 火垂るの墓 (1988)

ご飯はうまい。

The rice is delicious.