Easy Lentil Shepherd's Pie (vegetarian)

Bahan-bahan (6 porsi)

• 1 cup brown lentils (or green lentils)
• 3 -4 cups vegetable broth (or beef broth if not making vegetarian)
• 2 teaspoons olive oil
• ½ cup chopped onion
• 1 cup chopped mushrooms (about 4 oz)
• 1 carrot (chopped)
• 1 rib celery (chopped)
• ½ cup frozen peas (thawed)
• ½ tablespoon all-purpose flour
• 3 tablespoons red wine
• 2 teaspoons Worcestershire sauce (use vegetarian Worcestershire sauce if desired)
• 3 tablespoons tomato paste
• 2 tablespoons chopped fresh parsley
• salt and black pepper (to taste)
• 2 ½ cups prepared mashed potatoes