In your slow cooker, add 4 cups water a half packet of au jus mix, taco seasoning packet, and tomato paste.Whisk until smooth.Add stew meat, or sirloin, and drained kidney beans.DO NOT ADD SALSA YET!Cook on low for 8 to 9 hours.Stir in fresh salsa.Cook for 20 minutes longer, just enough to warm it up again.Serve with fritos on top.If the chili is too salty for your taste, add some water at the end of cooking time.