Preheat your oven. Begin by preheating your oven according to the tater tot package instructions, ensuring you have a baking sheet lined with parchment paper or aluminum foil for easy cleanup.
Prepare the meat mixture. In a medium mixing bowl, combine 1 lb ground beef, 1 tbsp Worcestershire sauce, and salt and pepper to taste. Use your hands or a fork to mix until fully incorporated, but be careful not to overwork the meat to keep it tender.
Shape the patties. Take small portions of the meat mixture and shape them into small patties that match the size of your tater tots. Ideally, you should have 24 small patties to correspond with the number of tater tots.
Bake the tater tots. Arrange the frozen tater tots in a single layer on the prepared baking sheet. Bake according to the package instructions, typically around 20-25 minutes, until they are golden brown and crispy, flipping halfway through for even cooking.
Cook the patties. While the tater tots are baking, heat a skillet over medium-high heat. Once hot, add the shaped patties to the skillet. Cook for 2-3 minutes per side until browned and cooked through, making sure to check the internal temperature reaches at least 165°F (74°C).
Add cheese. About one minute before the patties are done cooking, place a square of 1 cup shredded cheddar cheese on top of each patty. Cover the skillet with a lid to help the cheese melt beautifully.
Assemble the sliders. Start by placing one baked tater tot on a serving plate. Layer with one turkey or chicken patty, followed by a half of a cherry tomato and a pickle slice. Top it off with another tater tot, creating a mini burger stack.
Secure with toothpicks. Insert a toothpick through the center of each mini cheeseburger to hold everything together neatly.
Serve warm. Offer ketchup and mustard on the side for dipping, and enjoy your Mini Tater Tot Cheeseburgers warm!