Can I Make It Through a Week on Just $50 for Groceries?

Hey folks, I'm in a tight spot and decided to set a budget challenge for myself. I want to see if I can survive the week only spending $50 on groceries. Do you think it's doable? What should I buy to make it through the week without feeling like I'm missing out? I've heard about the $5 Costco chicken – any other tips?