Roast Peppers: Preheat oven to 400°F. Remove cores from bell peppers, cut into quarters, toss in olive oil, and roast on a lined baking sheet for 20 minutes.
Cook Pasta: While peppers roast, boil water and cook pasta according to package instructions. Drain and return to the pot.
Blend Sauce: Add cashews, garlic, basil, thyme, salt, and pepper to a blender.
Add Roasted Peppers: Once peppers are done, blend them with the cashew mixture and ½ cup boiling water until creamy. Adjust seasoning.
Mix & Serve: Toss the sauce with the cooked pasta. Garnish with fresh basil and cracked black pepper. Serve hot!