In large saucepan, sprinkle unflavored gelatine over cold water; let stand 1 minute.
Stir over low heat until gelatine is completely dissolved, about 5 minutes.
Add strawberries, sugar and lemon juice. Bring to a boil, then simmer, stirring occasionally and crushing berries slightly, 10 minutes.
Stir in liqueur. Spoon into jars; cool slightly before refrigerating. Chill until set, about 3 hours.
Store up to 4 weeks in refrigerator or up to 1 year in freezer.Servings: 4 cups