1. In a large stockpot, heat 3 tablespoons of oil to medium-high heat. Add crushed garlic and chopped onions, and stir until onions just start to brown. Add the can of crushed tomatoes, cumin, cayenne pepper, chili powder, salt, pepper, and half of the lime juice. Turn up the heat until it bubbles, stirring constantly, then gradually stir in chicken stock. Turn down to low and simmer for 10 minutes. Add diced chicken. (Optionally add black beans or fresh corn kernels).
2. To make the tortilla crisps, julienne 12 corn tortillas into narrow, uniform strips.
