Buffalo Falafel Subs

Name: Buffalo Falafel Subs
Ingredients: 2 cans (15 ounces each) chickpeas, rinsed and drained; 3 garlic cloves, roughly chopped; 3 green onions, roughly chopped; 1 egg; 1/2 cup all-purpose flour; 2 tablespoons fresh parsley leaves; 2 teaspoons baking powder; 1-1/2 teaspoons ground cumin; 1 teaspoon grated lemon zest; 1/2 teaspoon kosher salt; 1/4 teaspoon ground black pepper; 1/4 teaspoon ground cayenne pepper; 1/2 cup plus 2 tablespoons buffalo sauce, divided; 3/4 cup hummus; Vegetable oil, for frying; 4 submarine buns, split; 2 cups thinly sliced Romaine lettuce; 2 Roma tomatoes, chopped; 1/2 cup crumbled blue cheese