It’s also great with rotisserie chicken or other leftover chicken you might have on hand all year long. So comforting and delicious but also crazy-easy!
In a large nonstick skillet, heat oil over medium heat and add onion, cooking until the onion begins to soften (about 2 minutes), stirring occasionally.
Whisk flour into milk. Slowly add milk mixture and broth to the pan, whisking continuously as you do so (to avoid lumps), until the mixture is smoothly combined.