For the stove top: Place a large pot on the stove over medium heat and cook the bacon and sausage until browned, breaking into pieces as it cooks. Add onion and garlic and cook for a few more minutes.
Add chicken broth, potatoes, oregano, basil, thyme, and pepper. Stir to combine.
For the Instant Pot: Set to high pressure for 5 minutes. Manually or naturally release pressure when it's done cooking.
For the stove top: bring the soup to a simmer for about 20 minutes until the potatoes are tender.
While the soup is cooking, pour the cashews, water, and cornstarch into a high speed blender and blend until very smooth.