Add mussels to the pot, cover, and bring to a boil. Every 30 seconds or so, shake the pot around (while keep the lid tightly on) so the mussels move around and cook evenly. Cook for about 5 minutes, until the shells open*.
Phyllo shells can be found in the freezer section of most finer grocery stores. If you can not find phyllo shells at your local grocery store, you can substitute ready-made pie crust or puff pastry. Cut the dough with a 2 1/2-inch cookie cutter or biscuit cutter and press the rounds ...