In case this helps anybody- take a pack of turkey mince (800gms) , about 800 cals, brown it all, drain thoroughly. Fry a couple of chopped onions, spoonful cornflour stirred in, add 1 pint stock made from 2 Oxo cubes, add to pan and stir till mixed and a bit thicker. Add mince. Add seasoning, BUT I added too many chilli flakes so had to cool it down with a tin of tomatoes, 2 spoons low fat fromage frais, and some lemon juice.
This of course made enough for 3 meals for the 2 of us. The extra bits I added came to much less than 200 cals so including the topping of mashed carrot and parsnip, came to about 1000 cals in total. Ate one portion, froze the other 2, a yummy meal for about 150 cals each.