My favorite ground beef recipe hands down is one I made up - Ground beef gyros. I haven't made it for a long time because I have no idea what to use for a gluten free version of pita bread. The last time I made it, I had pitas for my family and I made mine into a salad which was good, but not the same as stuffed into a pita.
1 lb ground beef, cook and crumble ground beef seasoned with salt, granulated garlic, granulated onion, oregano, and lots of black pepper.
To make gyro: Stuff pita break with beef, sliced cucumbers, sliced red onions, sliced tomatoes, chopped romaine lettuce, crumbled feta cheese, and top with tzatziki sauce or a yogurt dill sauce (yogurt, mayo, dill, salt, pepper, lemon juice, granulated onion, granulated garlic).
I like these too:
Cheesy Mexican Stuffed Peppers
Greek Meatballs
Slow Cooker Bolognese-this makes enough for us to have three meals from it and so I freeze some of this in portions. It is so yummy.
Smothered Burritos - I make these with gluten free tortillas.
I love my Grandma's meatloaf recipe and her hamburger soup. I can write out the recipes if anyone wants them. And tacos are pretty regular around here, too.