Mince and onions with mash - my god that's made me hungry! Haven't had that for years
OP - chilli con carne? Very yummy, and very versatile. I make it up a batch at a time and freeze enough to feed the three of us another 2 or 3 times. You can serve with either rice or a jacket potato. DS is 12 months and loves it.
Make some lamb koftas to bbq - mix up the lamb mince as you would for a burger but add a little chilli and pack the meat around skewers, then serve with salad and tsatziki, yum.
I do a dish where i cook the mince and parboil and slice some potatoes, i then layer the mince and potatoes till potatoes are on the top, then i pour cheese sauce over the top and grated cheese over that! Yum!
Beef - Meatballs made with finely chopped onion and breadcrumbs (no egg, it makes them heavy) in a tomato sauce with a splash of vinegar (red wine or balsamic) and some chopped gherkins to make it a bit sweet and sour. Serve with rice.
Lamb - shish kebabs made with onion, chopped parsley and coriander, ground cumin and coriander seeds, garlic and pine nuts. Grill and serve with houmous, cous cous, salad and pitta bread.
Stuffed courgettes/peppers/onions/beef tomatoes - shallow fry the mince with some onion and herbs (and the scooped out courgette/tomato flesh if that's what you're using), boil some rice, mix it all together and stuff your veggies. Drizzle with olive oil and bake in oven until the veggies are soft.