Ingredients:

1. 1 ripe banana, peeled
2. 1/2 cup fresh or frozen strawberries
3. 1/2 cup spinach (fresh or frozen)
4. 1/4 cup rolled oats
5. 1/2 cup Greek yogurt (or non-dairy yogurt)
6. 1/2 cup milk (dairy or non-dairy, like almond or oat milk)
7. 1 tablespoon honey or maple syrup (optional)

Instructions:

1. Add all the ingredients to a blender and blend until smooth.
2. Taste and adjust the sweetness by adding more honey or maple syrup if needed.
3. Pour the smoothie into a glass and serve immediately.

Tips:

- Use fresh spinach for a milder flavor or frozen spinach for a stronger flavor.
- Substitute other types of milk or yogurt to suit your dietary preferences.
- Add other ingredients like protein powder, nuts, or seeds to boost the smoothie's nutritional value.
- Experiment with different types of fruit to change up the flavor.

Enjoy your delicious and healthy Strawberry-Banana-Oats-and-Spinach Smoothie!