In the bowl of an electric mixer, whisk together the yeast, sugar, water and lard to make a paste. Add the flour and salt and mix, using a dough hook, until the dough comes away from the sides of the bowl. Grease the bowl with olive oil and place the dough back in the bowl. Cover the bowl with plastic wrap and let the dough rise until double in size, about 1 hour. Turn the dough out onto a floured surface and divide the dough into 4 pieces. Roll the dough into balls, cover and let the dough rest for 15 to 20 minutes. The dough is ready to be shaped.