This is a lovely cheese sauce on toast. It was my mom’s recipe. She used to make this when she had to feed a family of 9 with very few resources. However, I remember this as some of the best comfort food. Serve over buttered toast. For an extra special dish, we like to top it with a fried egg.
Melt butter in a saucepan over medium heat. Cook and stir onion until soft, about 5 minutes.
Stir flour and salt into onion until flour forms a paste, 1 to 2 minutes.
Gradually whisk milk and Dijon mustard into onion mixture and bring to a simmer, whisking constantly until the sauce thickens, 5 to 7 minutes.
Stir Cheddar cheese and white beans into sauce until cheese melts into sauce, 5 to 7 minutes.
Per Serving: 365 calories; protein 18g; carbohydrates 24.4g; fat 22g; cholesterol 66.4mg; sodium 540.3mg.