Line a rimmed baking sheet with parchment paper. Cut each pita into 8 equal-sized wedges. Lightly brush pita wedges with olive oil on both sides and place on lined baking sheet.
Season pita with salt and pepper before placing in oven. Bake for 5-6 minutes before turning each wedge to toast the opposite side. Return to oven and continue baking for another 5 or 6 minutes, or until pita wedges are golden brown. Remove from oven and set aside.
Add cannellini beans, fresh garlic, lemon juice, sage leaves, and olive oil to the bowl of a food processor or blender and blend until smooth.