These fluffy whole-grain pancakes, studded with creamy slices of banana, are a 1-bowl dream that can be whipped up in 5 minutes flat. This makes a small batch (only 275 calories for the stack) that is easily doubled. You can easily sub whole wheat flour for the buckwheat flour if you don't have it on hand. For a vegan option, you can try subbing soy yogurt for the yogurt. To make these gluten-free, use gluten-free oats.