Pressure Cooker Irish Lamb Stew

2 pounds boneless lamb, cut in 1 inch cubes
3 cups boiling water
1-1/2 teaspoons salt
pepper to taste
1-1/4 cups carrots, cut 1 inch
4 medium onions, quartered
4 medium potatoes, sliced thick
3 tablespoons flour
3 tablespoons cold water

Put the lamb, boiling water and seasonings in the pressure cooker. Bring to  15# pressure and process 12 mins. Cool immediately. Add vegetables. Bring to  15# pressure again and process 5 mins. Cool immediately. Return cooker to stove. Mix the flour and cold water together until smooth. Add to stew and simmer (uncovered) for 2-3 mins. until thickened. If you like you stew a little darker, you can add some Kitchen Bouquet to the flour mixture.
Serves 4