Wash and
drain the lentils, carefully picking through them to take out any pebbles.
In a 3-quart
saucepan, heat the 6 tablespoons oil until just smoking. Add the
onions and sliced garlic. Cook until softened but not brown, about 6 to 8 minutes. Add the
lentils and the hot
chicken stock. Bring the liquid to a boil. Lower then heat and
simmer for 25 to 30 minutes, keeping the level of the liquid just over the lentils by periodically adding more water. Add the
pasta shells during the last 6 minutes of cooking. Season, to taste, with salt and pepper.
In the meantime, preheat the grill or broiler. When the soup is ready to serve,
grill or toast, slices of the bread until golden brown, about 2 minutes per side. Rub each slice with a cut
garlic clove.
Ladle the
soup into warm bowls. Place a slice of
garlic bread on top of each soup serving.
Drizzle the bread and the soup with the chili oil and serve immediately.