Combine. In the bowl of a food processor or a high-speed blender (our preference), combine the drained chickpeas, roasted red peppers, tahini, olive oil, lemon juice, cumin, salt, and smoked paprika. Add red pepper flakes, if using.
Puree the hummus, adding water 1 Tablespoon at a time, if needed, to thin out the hummus. (I almost never need added water since the bell peppers add enough liquid.) If using a food processor, you may need to stop and scrape down the sides of the bowl a few times.
Taste & Adjust. Taste the hummus and add more lemon juice, salt, cumin, or red pepper flakes, to taste.
Serve & Store. Add any desired garnishes and enjoy right away, or cover the hummus and store in an airtight container in the refrigerator 3-4 days. Enjoy with fresh veggies, crackers, pita chips, pretzels, etc.