Use the dough blade in your food processor. Combine the flour, salt and yeast in the bowl. Test the temperature of the flour mixture using an instant read thermometer. Adjust the water temperature so that the individual temperatures of the flour and water when combined equal 145 degrees (i.e. if the flour is 70 degrees, then the water must be 75 degrees.) With the processor running on low speed, add the water through the small feed tube and process for 45 seconds. Transfer the dough to a large ungreased bowl. Cover with plastic wrap and let rise for about 1 1/2 to 2 hours at room temperature.