Ingredients

Bacon Dressing:

5 slices bacon
1 1/2 tablespoons finely chopped shallot
1/2 cup red wine vinegar
2 tablespoons honey mustard, or more to taste
Salt and freshly ground black pepper

Spinach Salad:

8 cups fresh spinach leaves, stems removed
8 ounces white button mushrooms (about 2 1/2 cups), thinly sliced
1/2 red onion, thinly sliced

Directions

In a skillet add the bacon and cook over medium heat until crisp. Using a slotted spoon transfer the bacon to a paper towel lined plate to drain. Roughly chop and set aside.

Pour off all but 2 tablespoons of fat from the skillet. Heat the remaining fat over medium-high heat, add the shallots and cook for 2 minutes, stirring occasionally. Whisk in the vinegar, desired amount of mustard, and salt and pepper, to taste. Scrape the brown bits from the bottom of the skillet, bring to a simmer, then remove the skillet from the heat.

For the salad, in a large salad bowl, toss together the spinach, mushrooms, bacon and onion. Pour the dressing over the salad and toss to combine. Serve warm