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I think I agree with him, in theory. In practice, however, I have difficulty eating the same thing over and over, even with the promise that, every 30 days or so, my bored taste buds will experience sensory overload in a culinary Las Vegas.
Now that Karl really is operating on a budget, he has put his philosophy into practice. He received a 5-qt Rival Slow Cooker for Christmas and has made good use of it.
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As if the cost alone weren't enough to drive you to a diet of rice and beans, think of the nutrition side! Karl's stew contains no added sodium, or even spices. There is no oil, and it is vegetable- and protein-rich. As long as he drinks some milk and eats some fruit every day (an apple a day with lunch, milk with his raisin bran in the morning), Karl is eating ridiculously well-balanced meals for about $0.50 each.
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In the meantime, I do enjoy a bowl of Karl's delicious stew every once in a while. But I'd rather eat a Swad Microwave Curry with my rice (paneer a must!) one day, and a peanut-butter and jelly sandwich the next. Variety, for me, seems to be a little more indispensable than for Karl.
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Karl's "Budget Bean Stew"
1 32-oz bag of dried mixed beans (15-bean mix) (follow soaking instructions on bag)
1 16-oz bag of dried lentils
1 medium onion, chopped
1 cup celery, chopped
4 cloves garlic, chopped
1 large carrot, chopped
1 yam, cubed
1 medium parsnip, chopped
1 8-oz can tomato sauce
3 or 4 packets Trader Joe's low-sodium vegetable broth concentrate (or low-sodium bouillon cubes)
2 or 3 cups shredded cabbage
3 or 4 cups water
Put all ingredients, except water, into a 5-qt slow cooker. If you have a smaller slow cooker, you'll probably want to pare down the amounts or your slow cooker will be overflowing.
Once you have all the ingredients in, pour water in until you can see it approaching the rim. Set your slow cooker to low, and cook for 8-12 hours. You really can't over-cook this.
Enjoy with rice, or just as a stew!