Cheap and tasty, that is my life motto. Pagliacci's made the BEST pesto pasta salad but they discontinued it! Emily used to order it for meetings and I would need an entire vat to myself. The Seattle Times ran a very detailed knockoff recipe: https://www.seattletimes.com/pacific-nw-magazine/15257161/.
I picked up the ingredients at TJ's. It works out to $1.13 a serving (though it's hard to stop at one serving).
Bag of penne: 99 cents
Tub of pesto: $3.49
Bag of frozen artichoke hearts: $3.29
Bag of frozen petite peas: $1.29
Already had:
A couple spoonfuls of mayonnaise
Some shakes of parmesan
Salt and pepper to taste