Method: Heat oven to 400 degrees. Lightly grease 8-9 inch loaf pan with oil or cooking spray and set aside.
Bring vegetable broth to a boil and add lentils. Cover and simmer over medium heat for 25-30 minutes until lentils are tender and most or all of the liquid is absorbed. Drain any excess liquid and transfer to a large bowl to cool. Note: It’ important to let them cool or they will be too mushy when mashed.
Meanwhile, heat 1 tbsp olive oil in a skillet and add onion and celery, saute over medium heat 3 minutes. Add potatoes, garlic, poultry seasoning, and pepper and continue cooking 3-5 minutes, or until vegetables are tender. Remove from heat.
With a potato masher, mash cooled lentils (not to the point of being pureed). Add vegetable mixture and continue to mash to combine. Next add the remaining ingredients and mix in - using your hands works best.
Transfer to loaf pan and press the mixture in, smoothing out the top so it’s even.
Bake for 25-30minutes or until top and edges look lightly browned.