ruby-red grapefruit marmalade

How To Make ruby-red grapefruit marmalade

• 
  Step 1
  remove thin outer rind of grapefruit and lemons with a vegetable peeler and slice thin using scissors or a sharp knife. Or use a zester. Place rind and water in a large stainless steel or enamel saucepan. Bring to a boil over high heat; cover, reduce heat and boil gently for 20 minutes.
• 
  Step 2
  Remove and discard remaining white rind and seeds from fruit. Finely chop pulp in a food processor or blender and add to saucepan. Bring to a boil over high heat, reduce heat, cover and boil gently for 10 minutes, stirring frequently.
• Step 3
  Add sugar to fruit. Return to a boil over high heat and boil rapidly, uncovered until mixture will for a gel (using the ball blue canning method for testing), about 30 minutes, stirring frequently. Remove from heat.
• 
  Step 4
  Ladel into hot jars and process for 10 minutes, or longer depending on your elevation.
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