Boil 7/8 cup water with onion soup mix. Remove from heat and stir in TVP. Lightly grease bottom of small or medium crock pot. Roughly tear up three tortillas and line the bottom. Cover with 1/3 of the sauce. Layer 1/2 of the TVP and onions and 1/3 of the cheese. Make another layer of 3 tortillas, 1/3 of the sauce, rest of the TVP, rest of the onions and 1/3 of the cheese. Layer remaining tortillas, cheese and sauce. Cover and cook on low for 6-8 hours. Serve over corn chips (not calculated in nutrition).