Rosie is planning to make raspberry lemonade for a party

That sounds delicious! Here's a simple recipe for raspberry lemonade:

Ingredients:
- 1 cup fresh raspberries
- 1 cup fresh lemon juice
- 1/2 cup granulated sugar (adjust according to taste)
- 4 cups cold water
- Ice cubes
- Lemon slices and fresh raspberries for garnish (optional)

Instructions:
1. In a blender or food processor, puree the fresh raspberries until smooth.
2. Use a fine-mesh strainer to strain the raspberry puree into a pitcher, removing any seeds.
3. Add the fresh lemon juice to the pitcher with the raspberry puree.
4. Stir in the granulated sugar until it dissolves completely.
5. Add the cold water and stir well to combine all the ingredients.
6. Taste the raspberry lemonade and adjust the sugar or lemon juice according to your preference.
7. Chill the lemonade in the refrigerator for at least 1 hour.
8. Before serving, add ice cubes to a glass and pour the raspberry lemonade over the ice.
9. Optionally, garnish with lemon slices and fresh raspberries for an extra touch.
10. Stir well before enjoying!

Note: You can also make a large batch of raspberry lemonade by doubling or tripling the ingredients.