Place a 10-inch sauté pan over medium-high heat. Add the olive oil and then, when the pan is quite hot, add the sausage. Use a spoon to break up the meat. Cook for 8 to 12 minutes, or until the sausage is cooked through and beginning to get crispy. If using chicken sausage there should not be a great deal of fat in the pan, but if using Italian sausage, drain all but 1 to 2 tablespoons of fat.