A delicious and healthy snack can be made by spreading mashed avocado on rice cakes, topped with halved cherry tomatoes, and a sprinkle of salt and pepper. This satisfying snack totals around 200 calories. You could also create mini open-faced sandwiches by layering sliced cherry tomatoes on the avocado spread and drizzling with balsamic glaze for some extra flavor. Both options are rich in healthy fats and great for a mid-day pick-me-up.