I've never quite understood the point of a "slider." You take a perfectly good burger, miniaturize it, and sell them as something special. Personally, I don't want my bite-size determined by anyone else. Most chefs have no idea how big my mouth is.
However, when it comes to following a keto-friendly diet, the slider is a handy invention. Why? Because I have not yet found a lettuce leaf that will contain a Big Mac. They always tear first.
So instead, I save the hardier inner leaves of your typical iceberg lettuce and pair them with my always-smaller-than-intended-because-I-forget-meat-shrinks hamburger patties, top with my favorite condiments, and voila! A meal fit for a very lean king.
1lb ground beef
1 head iceberg lettuce
Pickles/Onions/Relish/Whatever else you like on your burger
Form meat into patties. Make them BIGGER than you think you should; I always do this, and they still end up too small. But that's OK, because you want "too small." Cook on grill or stovetop till done. I season mine with salt and pepper.
Pull apart the lettuce leaves carefully. The outer leaves are much larger, but they tend to tear. The middle ones are better, but they tend to stick stubbornly to the others. The inner leaves just before you get to the yellowish core should be just right. Toss the rest of the leaves into a plastic bag and save in the fridge for your next salad.
Place the cooked meat patties onto/into the lettuce leaves and top with your favorite toppings. Go easy on onions and tomato, as they are higher in carbs. I usually use a dab of homemade ketchup; it's not low carb, but it's HFCS free and I just gotta have a little ketchup on my burgers.
Please forgive the poor lighting in the picture, we are in the area hit by the derecho last week and still have no power. Thankfully our generator is holding up, but we are trying to conserve on how many lights/appliances we use. Keep those still in the dark (and without water!) in your pre-prandial prayers!