Cheesy Vegan Veggie Pizzette

Name: Cheesy Vegan Veggie Pizzette
Cuisine: European, Mediterranean
Ingredients: 1 red onion, thinly sliced (2 cups); 1 zucchini, cut into long diagonal slices (1 cup); 1 red bell pepper, cut into thin strips (1 cup); 6 whole-wheat pita breads; 1 ½ cups store-bought pizza or marinara sauce; 2 tablespoons fresh basil, finely chopped; 1 (15-ounce) can white beans, drained and rinsed; ¼ cup nutritional yeast; 1 clove garlic, minced (½ teaspoon); 2 teaspoons white wine vinegar; 1 dash crushed red pepper flakes; Sea salt; Freshly ground black pepper