Pre-heat oven to 350 degrees.
Line baking sheet or loaf pan with parchment paper.
Boil 1 cup water with 2 cups lentils. (follow directions on lentils bag)
While cooking the lentils. Add 1 tbsp olive oil to skillet and sauce onion, celery, carrots, mushrooms and bell peppers. Once the vegetables are beginning to soften add the garlic and sauce for 2-4 more minutes.
Remove lentils from heat.
Fold all ingredients except, ketchup and brown sugar into a bowl.
Place small portions into a food processor (if you have a small one) and pulse until the mixture is a dough like consistency.
Place mixture onto the baking sheet.
Mold into a loaf shape.
Bake for 40 minutes.
Remove the loaf from the oven.
Spread the ketchup onto the loaf and sprinkle with brown sugar.
Bake for another 10-15 minutes.
Remove the loaf from the oven, let cool, and enjoy!