Needing to lower the fat in the family diet (health/weight reasons) where cheese is going to be the hardest bit for me. Mr B will find both less meat as well as cheese the hardest. Master B will probably keep eating as he currently does (bean pole and still growing).
Although I have number of my own recipes that are easily modified am also going to intersperse with new recipes.
M Potato Boulangere (par boiling the onion rather than frying)
T Meal from Freezer - lamb tagine with cous cous
W Pasta: happen to have some parma ham so will go for a varient of this pasta with pea recipe - my variant is here
Th Chicken - spiced chicken with rice and crisp red onions
F One of the below depending on what is in the shops!
In the must try when appropriate list:
http://www.bbcgoodfood.com/recipes/4811/panfried-venison-with-blackberry-sauce
Turkey spag bol
http://www.bbcgoodfood.com/recipes/12134/italian-turkey-steaks-with-garlicky-bean-mash
http://www.bbcgoodfood.com/recipes/10767/turkey-burgers-with-beetroot-relish
Chicken burgers with spinach and pine nuts
http://www.bbcgoodfood.com/recipes/4380/very-quick-chicken-casserole
http://www.bbcgoodfood.com/recipes/9021/chicken-and-white-bean-stew
http://www.bbcgoodfood.com/recipes/13192/lamb-and-squash-curry
Moroccan lamb stew with pumpkin
Spicy spaghetti with garlic mushrooms
Light carbonara
and for lunch
http://www.bbcgoodfood.com/recipes/13241/chargrilled-turkey-with-quinoa-tabbouleh-and-tahin