I remember reading a verse that said something to the effect of it being good to spend much or most of our money on food. What is that verse?
Isaiah 55 says:
“Come, all you who are thirsty, come to the waters; and you who have no money, come, buy and eat! Come, buy wine and milk without money and without cost. 2 Why do spend money on what is not bread, and your labor on what does not satisfy? Listen, listen to me, and eat what is good, and you will delight in the richest of fare. 3 Give ear and come to me; listen, that you may live. I will make an everlasting covenant with you, my faithful love promised to David.
It isn't a command, it is an observation. The Messiah that is coming will satisfy the poor and you more than you ever could.
The closest thing to an injunction would be 1 Timothy 6:
6 But godliness with contentment is great gain. 7 For we brought nothing into the world, and we can take nothing out of it. 8 But if we have food and clothing, we will be content with that.
Again, the focus is on the contentment, not the actual spending though.