Place all chili ingredients in a 7-cup rice cooker and cook until unit switches to "warm." For stovetop, add all chili ingredients to a large saucepan, bring to a boil, reduce heat and simmer until juice is reduced by about 50 percent, about 20 minutes
To assemble the casserole: Meanwhile, cut slices of cheddar cheese off a block of cheddar. Cut hot dogs in half crosswise (you will have 2 hot dog pieces, so you have 2 WHOLE sections of franks). Make a slit on the top of each hot dog half and insert the cheese slices. Set aside.
Open biscuit dough and separate biscuits. Flatten each biscuit slightly. Place a cheese-stuffed hot dog portion in each biscuit and about a teaspoon of chopped onion. Bring ends of biscuit up around hot dog and seal. Set aside.
Preheat oven to 350 degrees F. Spray or grease a 13 x 9 -inch baking dish.
Place chili in baking pan. Top with biscuit-wrapped hot dogs. Sprinkle with one half of the shredded cheddar cheese.
Bake at 350 degrees F for 30 minutes, or until biscuits are brown and crusty on top. Add remaining half of the shredded cheese. Bake for an additional 5-10 minutes. Garnish with chopped green onion.