Pre-heat oven to 350 degrees
Lightly grease 24 mini muffin cups and divide chicken sausage, red pepper, kale, and cheese among cavities (can do in two batches in 12-cavity muffin tin).
In a medium-sized bowl, whisk together eggs and milk. Divide egg mixture evenly among into muffin tin cavities.
Bake at 350 degrees for about 20 minutes, until quiches are turning lightly golden.
Let cool for a few minutes before releasing from muffin tins and letting cool completely on wire racks.