beef, cut into small pieces (preferably very thinly sliced steak) • bacon • cooked Peruvian beans (you can use any cooked beans you have at home) • To taste: onion, cilantro, and lime • Cambray onions (optional; also called Mexican spring onions) • Tortillas • tomatillos (or green tomatoes) • onion • garlic clove • fresh cilantro • serrano pepper • vegetable or chicken broth, or water (1 liter) •