Toni Okamoto’s book “Plant Based on a Budget” is coming out soon and looks likely to fit the bill.

https://www.amazon.com/Plant-Based-Budget-Delicious-Recipes-...

I’ve been cooking entirely plant based for three years now and cook almost all my own meals. At first I was following recipes but now I just keep a well stocked cupboard and improvise. The results are a little variable but I enjoy cooking this way more. But the basis of my diet is legumes and whole grains with as many fresh fruits and vegetables as I can handle. It’s very cheap to eat this way.

Open a bag of Fritos. Dump in a cup of melted Velveeta, some pickled jalapeños, half a can of black beans. Mix it up and eat it out of the bag. Then, loathe yourself and wonder how it came to this.

Most of the loathing probably comes from the month's RDA of sodium described in your proposal.

Substitute some sort of more traditional cheese and some roasted unsalted peanuts in the above recipe and you'll probably enjoy it about as much and feel better afterwards.

Substitute Fritos for not Fritos to make the dish even better.

Roasted veggies. Garlic is your friend. Prep time zilcho.