Preheat oven to 350 degrees. Spray a 10-cup bundt pan with non-stick cooking spray and set aside.
Open cans of biscuits and cut into quarters. Place biscuit pieces into a large bowl or ziploc bag. Top with granulated sugar and cinnamon. Toss dough pieces with cinnamon sugar to coat evenly.
Sprinkle 1/4 cup nuts in the bottom of the bundt pan. Top with half of the dough pieces. Sprinkle with remaining 1/4 cup nuts and dough pieces.
In a large liquid measuring cup, whisk melted butter together with brown sugar, heavy cream and salt. A thick, grainy sauce should form. Pour sauce over dough pieces and spread evenly.
Bake uncovered for 30-40 minutes or until dough pieces are completely baked. Cool 5-10 minutes. Turn upside down onto serving platter and replace any dough pieces of nuts which may have stuck to the bottom of the pan. Serve warm.
Feel free to use pecans or almonds in place of the walnuts or omit all together.