Grab a knife & cutting board
Chop onion into small pieces
Turn on stove top to medium (level 3)
Add 1/4 cup butter to pot
Add onions to pot
Cook for 5 minutes
Add 1 tbsp garlic to pot
Add 3 tbsp flour to pot
Cook for 1 minute
While continuing to stir, add 2 cups milk to pot
Add 2 cups cheddar cheese to pot
Stir until cheese is melted
Add chicken to pot
Add pasta to pot
Season with salt & pepper to pot
Turn off hotplate