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Except rice, I freeze everything. Pancake for Breakfast, Fruits
I cut onions and freeze them. So, I don't need to cut it every time and its a healthy way.
Prepare chappathi and Freeze it. Even chappathi dough will do.
Grind some 10 tomatoes and refrigerate it. So that he doesn't need to cut tomatoes every time.
You can also make stir fry vegetables (sorry. I'm a vegetarian) and freeze it.
Cook beans and chickpie and freeze them. He can use them for dinner.
I'll let you know once I got more ideas.