Grind peppers finely (I put in food processor until they are a mush).
Place peppers, vinegar, mustard & sugar in a large pot & cook a while (until pepper bits are translucent). Add flour clearjel (that has been thinned to a smooth paste with cold water) to mixture in pot, stirring constantly. Cook until thick and smooth. Pour into hot jars, seal, boiling water bath fifteen minutes.