Step 1

Place the asparagus, mayo, and cheese together in a large bowl.

Step 2

In a skillet over medium heat, add the onion with a drizzle of oil. Saute the onion for about 5 minutes until soft and slightly browned. Sprinkle the garlic and flour all over the onion mixture. Stir to create a roux and let the flour cook for a minute or two.

Step 3

Very slowly pour the milk into the skillet, stirring as you go to incorporate the milk into the flour mixture. Let the milk sauce come to a bubble. Sprinkle with salt and pepper.

Step 4

When the milk sauce is slightly thick, pour it into the bowl with the asparagus and other ingredients. Stir to mix everything together, and pour the mixture into a baking dish, 9x13 or similar. Sprinkle the crushed crackers over the casserole.

Step 5

Bake the asparagus casserole at 375F for 40-50 minutes or until the asparagus is just tender and the cheese is bubbly. Broil the top for one minute if you'd like to brown the crackers.

Step 6

Serve. Eat. Enjoy!