Easy Keto Beef Tacos

Preheat oven to 350 degrees F (175 degrees C).

Line 2 baking sheets with parchment paper or silicone mat.

Spread Cheddar cheese into four 6-inch circles, placed 2 inches apart.

Bake in the preheated oven until cheese melts and is lightly brown, 6 to 8 minutes.

Cool for 2 to 3 minutes before lifting with a spatula.

Place over wooden spoon handle wrapped in aluminum foil balanced over 2 cups/cans.

Let taco shells cool completely, about 10 minutes.

Cook beef in a skillet over medium-high heat until browned, stirring often to separate meat, about 7 minutes.

Season with , salt, and pepper; cook for 1 minute more.

Divide beef mixture among cheese taco shells.

Top with avocado, lettuce, Cheddar cheese, and tomatoes.