Oven roast the butternut squash. (see, "Easy Oven Roasted Butternut Squash", link in notes below.)
While the squash is roasting, heat 1-2 tbsp oil on medium heat in a large soup pot (6 quart). Cut bacon strips into ½ inch -1 inch pieces. Add the bacon pieces to the oil. Fry the bacon until crispy, stirring frequently. Remove from heat. With a slotted spoon, scoop out the bacon pieces; set aside. Reserve the oil/fat in the pot to sauté the veggies.
Return pot with oil/fat to burner and place on medium to medium high heat. Add the chopped/diced onion, carrots, celery, jalapeños, and garlic. Season with salt & pepper. Toss in bay leaves. Sauté until the veggies are slightly tender and onions are caramel color, stirring frequently.
Let squash cool until able to handle. While the veggies are sautéing, peel the skin off the squash with a knife. Cube the squash; set aside. In a blender, food processor, or NutriBullet puree 1-1 ½ cups of the roasted squash; set aside.
Add lentils to the pot with the veggies. Sauté slightly, a minute or two. Add the sage and garlic & herb seasoning.
Add black beans, tomatoes, and cubed squash. Season as needed with salt & pepper.
Add chicken stock/bone broth to pot and stir well. Using ½ chicken stock and ½ chicken bone broth adds depth to the soup.
Cover & bring to a boil. Reduce heat, add the pureed squash. Cover & simmer on low heat for approximately 30 minutes or longer.
Remove from heat. Remove bay leaves. Salt & pepper to taste. Garnish with crumbled bacon, sliced/diced jalapeños, & parsley. Roasted butternut squash seeds would also be a nice addition! Serve with a crusty bread and salad to complete the meal!