Preheat your oven to 350°F (175°C) and grease a 12-cup muffin tin.

Brown and crumble the breakfast sausage in a skillet over medium heat. Drain off any excess grease.

Whisk the eggs in a mixing bowl. Stir in the cheese and Bisquick, mixing well. Fold in the cooked sausage.

Evenly distribute the mixture into the muffin cups, filling each about two-thirds full.

Bake for about 20 minutes, or until the muffins are golden brown and a toothpick inserted into the center comes out clean.

Let the muffins cool for a few minutes before serving.