Thea's Roasted Pepper and Artichoke Hummus

1 Can unsalted garbonzo beans (rinsed and drained)
2 Tbsp. Tahini
1/2 Can artichoke hearts in water (rinsed and drained)
1/2 Jar roasted red pepper in water (rinsed and drained)
1 1/2 tbsp olive oil
Juice of 1/2 lemon
Pepper