Heat oil and butter in a Dutch oven over medium-high heat.
Add onion, ginger, and jalapeo; saut 4 minutes or until tender. Stir in 6 cups water and next 4 ingredients (through five-spice powder); bring to a boil. Cover, reduce heat, and simmer for 15 minutes or until lentils are tender, stirring occasionally.
Place one-third of lentil mixture in a blender.
Remove center piece of blender lid (to allow steam to escape); secure blender lid on blender.
Place a clean towel over opening in blender lid (to avoid splatters). Blend until smooth.
Pour pureed lentil mixture into a large bowl. Repeat procedure twice with remaining lentil mixture. Stir in cilantro and juice.