Preheat the broiler to high and position the oven rack 6 inches below the heat source. Line a baking sheet with aluminum foil.
Place pepper halves skin-side up on the baking sheet. Broil until the skins are fully blackened, 10 to 15 minutes, rotating the sheet a few times for even roasting.
Transfer peppers to a large bowl, cover with plastic wrap, and let steam for 10 to 15 minutes.
Once cool enough to handle, peel off and discard the charred skins under running water. Roughly chop the peeled peppers and set aside.
In a large pot over medium heat, melt the butter. Add onion, garlic, carrots, thyme, salt, and pepper. Cook, stirring occasionally, until softened, about 15 minutes.
Add roasted peppers, potato, and pears to the pot. Season again with salt and pepper.
Pour in the broth and bring to a boil over high heat. Reduce heat to low and simmer until the potatoes are tender, 15 to 20 minutes.
Remove thyme stems from the pot.
Blend the soup with an immersion blender until smooth, keeping the blender fully submerged to avoid splattering. (Or carefully blend in batches with a regular blender.)
Notes
Serving Size: 1 Cup
Ingredient Substitutions
Pears: Apples can be used instead of pears if that’s what you have on hand.Butter: Use olive oil as a substitute to make the soup dairy free.
Tips and Tricks
Roasting Peppers: Make sure the skins are fully blackened. This step is important for removing the skins and building flavor.Blending Safely: Keep the immersion blender fully submerged to avoid splatters. If using a standard blender, allow the soup to cool slightly before blending in batches.