01 -
Place rhubarb and water in a small saucepan. Heat over medium-low, stirring often, until rhubarb releases juices, softens, and breaks down, about 8 to 10 minutes. Bring to a boil, reduce heat, cover, and continue stirring occasionally.
02 -
Purée the cooked rhubarb with an immersion blender or standard blender until smooth. Straining is optional based on texture preference.
03 -
Return rhubarb purée to a clean saucepan. Allow to cool slightly, then whisk in sugar, eggs, and salt until smooth.
04 -
Heat mixture over medium to medium-high heat, stirring constantly, until thickened and it reaches a gentle boil. Remove from heat.
05 -
Stir in butter and vanilla extract until butter is fully melted. Optional: pass through a fine mesh sieve for a smoother texture.
06 -
Allow curd to cool, stirring occasionally to prevent skin formation. Chill for at least 3 to 4 hours before use. Store in the refrigerator for up to 2 weeks.