CRUSH mint leaves. Place in large saucepan; add water. Bring to boil on medium-high heat. Remove from heat; cover and let stand 10 min. Strain through cheesecloth-lined strainer or jelly bag.
MEASURE exactly 2 cups strained infusion into large saucepan. Add sugar, lemon juice and food colouring. Bring to full rolling boil on high heat; boil 1 min., stirring constantly. Remove from heat. Immediately stir in pectin. Stir and skim foam for 5 min.
POUR immediately into warm sterilized jars, filling to within 1/4 inch of rims. Seal while hot with sterilized two-piece lids with new centres. Let stand at room temperature until set.