Add the yeast to the warm water in a large bowl. Let it "proof" for 10 minutes or until it looks foamy on the top.
Add the flour (2 & 2/3 cups + 3 tablespoons), rosemary, parmesan, salt & pepper to the yeast water. Stir with a wooden spoon until thoroughly combined. The dough will the soft & sticky. Cover & let it stand for 2 hours at room temperature.
Turn the dough out onto a well-floured surface. Cover your fingers with flour & form the dough into a ball.
Add parchment paper or a small silicone mat to the crockpot. Spray well with cooking spray. Add the dough ball to the center. Cover. Cook on high for 2 hours.
Carefully transfer the loaf to a cookie sheet. Broil 4-5" from the heat for 3 to 5 minutes, or until top is dry & golden brown. Slice & serve.