These easy weeknight pies are full of surprises. Grill a bushel of produce—mushrooms, zucchini, red onion, and kale—and pile them onto rounds of store-bought flatbread. Sprinkle on blue cheese and mozzarella to bring a mix of funk and gooeyness. Then, since we've already bucked tradition, skip the marinara and drizzle your pizzas with a simple mustard vinaigrette instead. It offsets the rich cheeses and unites the vegetables into bites so satisfying, no one will notice you're having salad for dinner.