Hummus.

The hummus at the grocery store was $3.49 for a little tub. My SO and I thought about it for a few seconds, and decided to make our own.

Ingredients:
1 giant can of chick peas (Goya brand, $1.50.)
Juice of one lemon (50 cents)
About 3 tbsp tahini (about 15% of a $5 jar; so 75 cents)
A bunch of garlic (pantry item)
Olive oil (pantry item)
Salt (pantry item)

Stick it all in the food processor and puree until smooth. (This did remind me I "need" a better processor than the off brand I got at the thrift store for $4.)

Total = $2.75 plus pantry items for two to three times as much hummus. Total prep time? About 7 minutes, and half of that was figuring out the proportions.

Next time, I might roast some red peppers or add some olives.