Fills 3qt slow cooker, double recipe for 5qt.
Brown ground beef in a frying pan, crumbling as you go. Drain, add to slow cooker. Sprinkle 1 tbsp chili powder evenly over top.
Drain and rinse kidney beans, add on top of beef. Sprinkle remaining chili powder on top.
Top with diced tomatoes, with liquid.
Slow cook low for 8 hours, or high for 4-5 hours.
Optionally, add green peppers, onion, or garlic, or use chili-spiced tomatoes.