you could use turkey mince or 5% beef/pork mince to make meatballs with the addition of some breadcrumbs and some skimmed milk or water. poach them in the sauce and they will be very tender.
Also you can make sauces with stock thickened with cornflour.
Cauliflower (when cooked and blended) makes a very silky sauce/soup that you can then flavour e.g. mustard sauce with pork tenderloin medallions. Use this as a base (use less oil) and then flavour with mustard, or nutritional yeast and parmesan (a little goes a very long way flavour-wise) for a cheesy sauce.
Cook mushrooms in lea and perrins, add a beef stock cube and some cornflour to thicken and serve with turkey/chicken sausages.
Poach chicken breasts in stock so it's beautifully moist and you can have slices in salads or shred it and mix with sweet chilli or barbecue sauces for pulled chicken sandwiches.
Vietnamese noodle salads with nuoc cham sauce - nice and vibrant and no oil.
Make friends with spice rubs - cajun, zaatar, smoked paprika, smoky barbecue, nando's seasoning! and use them on lean meat - chicken breast, turkey escalopes, pork tenderloin, pork loin (fat removed).
Beef skirt is very low in fat but makes a delicious stew. brown in minimal oil, then add chopped onion, dried thyme, tomato puree, beef stock, red wine and simmer for a few hours in the slow cooker and then thicken.
Rice based dishes like paella, or biryani made with low fat protein like prawns and veggies.