Black Bean Tacos

Two cans of black beans ($1.78), a pack of corn tortillas ($1.50), half an onion, lime juice, cumin, and whatever toppings you can scrounge — salsa, sour cream, shredded cheese, hot sauce. Total: about $6. Mash half the beans for texture, leave the rest whole, and season aggressively with cumin, chili powder, garlic, and a squeeze of lime. The protein content rivals ground beef at a quarter of the cost. Taco Tuesday on a Wednesday because you're an adult and you can.