Put flour in large bowl, mix with salt and yeast. Stir in warm water and make a soft dough. Knead for 10-15 minutes until the dough shows some bubbles. Let rise in covered bowl for 45 minutes. The dough should be double size by then. Punch down the dough and knead a little. Divide dough into four parts and knead each part for a while. Form 40 cm long rolls and place on a greased cookie sheet. Let rise for another ½ hour. Brush baguettes with beaten egg and cut the surface. Bake in preheated oven at 425°F for about 35 minutes. Put a cup of water into the oven to get a nice crust.