I'm pretty sure my grandma makes food since before I was born that "survives weeks and months on a shelf and can be microwaved in 2 minutes and chucked on a pla

I'm pretty sure my grandma makes food since before I was born that "survives weeks and months on a shelf and can be microwaved in 2 minutes and chucked on a plate" and none of the ingredients inside are not sourced from her garden.