Aim for about 15 to 30 grams of protein for a meal. You can make your smoothie with dairy or pea milk or with plain yogurt or use protein powder and your favorite unsweetened non-dairy milk or water.
Fruit smoothies, nachos, frozen yogurt ... Yogurt doesn't need sugar to taste good. Buy plain yogurt and add something to it, like low-fat granola and fruit, for a truly healthy snack.