Big things often come in small packages. These sliders pack a flavorful punch that is sure to be enjoyed by all. This recipe can be written dozens of ways, depending on your various condiment preferences. The best thing about these paleo-friendly offerings is that you don't have a doughy soft bun to get in the way of your fresh lettuce and tomatoes.
Sliders can be a great appetizer for a big crowd or a meal for a smaller crew. This is also a really fun recipe to get kids involved in the process. Who doesn’t remember getting to make burgers as a kid?
1–1½ pounds (500-750 g) ground beef
1 large egg
1 small onion, finely chopped
1 cup (100 g) mushrooms, finely chopped
1 teaspoon (5 ml) black pepper
½ teaspoon garlic salt
1 each: yellow, red, green bell pepper
1 small onion, sliced
3 small tomatoes, sliced
1 head iceberg lettuce
6–8 medium portobello mushrooms
- Preheat your grill to medium-high heat. Be sure you have a clean grate and wipe it down with a little oil when hot.
- In a large bowl, mix ground meat, egg, chopped onion and mushrooms. Sprinkle in black pepper and garlic salt as you’re mixing the meat.
- Form small burgers with hands (no need for a fancy slider mold here). The burgers will be about 2 inches in diameter.
- Slice all three peppers down the sides to form large flat pieces (think like you’re cutting the walls off a house).
- Slice other onion and tomatoes thinly (about 1/8 inch). Pull lettuce apart into individual leaves. Try to keep them whole (as large as possible).
- Grill burgers 3-5 minutes per side, depending upon your desired doneness. Grill peppers and mushrooms 2-3 minutes per side, or until cooked through.
- Stack burgers between peppers or mushrooms and wrap with lettuce. Add the onion and tomato slices if you’re so inclined.
Variations—If you’d like, slice the tomatoes a bit thicker to use as bun—just know they’ll be pretty juicy.
—With sliders/burgers you can use almost any ground meat you want. We like to occasionally use ground turkey or ground venison.
—We always try to have a batch of our homemade Paleo Mayo (recipe here), Cave Ketchup (recipe here), or Chipotle Dipping Sauce (recipe here) ready to serve on top of these.
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Sliders pack seasoned ground beef with chopped onion and mushrooms into two-inch patties, grilled hot and stacked between charred peppers or portobello caps. Iceberg lettuce leaves wrap the whole thing instead of a bun. They serve as an appetizer for a crowd or dinner for a smaller crew, and kids love building their own.
Pro Tips
- Grill the peppers and mushrooms 2-3 minutes per side while the patties rest, so everything finishes at the same moment.
- Slice the onion and tomato about 1/8 inch thick so they sit flat in the stack instead of sliding out.
- Thick tomato slices can stand in for the bun entirely - just know they will be juicy.
- No slider mold needed; free-form two-inch patties cook just as evenly.
Frequently Asked Questions
Can I use another ground meat?
Ground turkey or venison are the recipe's own favorites, and the chopped mushroom-onion mix keeps leaner meats moist.
How many sliders does this make?
1 to 1 1/2 pounds of ground beef yields about a dozen two-inch sliders - six main servings or a full party platter.
How should I serve them to a crowd?
Set out the grilled peppers, mushroom caps, and lettuce leaves alongside the patties and let everyone build their own.
Recipe Card

Ingredients
Method
- Preheat your grill to medium-high heat. Be sure you have a clean grate and wipe it down with a little oil when hot.
- In a large bowl, mix ground meat, egg, chopped onion and mushrooms.
- Sprinkle in black pepper and garlic salt as you’re mixing the meat.
- Form small burgers with hands (no need for a fancy slider mold here). The burgers will be about 2 inches in diameter.
- Slice all three peppers down the sides to form large flat pieces (think like you’re cutting the walls off a house).
- Slice other onion and tomatoes thinly (about 1/8 inch). Pull lettuce apart into individual leaves. Try to keep them whole (as large as possible).
- Grill burgers 3-5 minutes per side, depending upon your desired doneness.
- Grill peppers and mushrooms 2-3 minutes per side, or until cooked through.




