Step 1

In a large skillet over medium heat, fry bacon until crisp, about 5 minutes. Transfer to a bowl.

Step 2

Pour rendered bacon fat into a measuring cup. Pour off all but 1/4 cup, or add olive oil to reach 1/4 cup. Return fat to skillet over medium-high heat until shimmering.

Step 3

Add onion, sugar, and vinegar. Cook until onion is softened, about 3 minutes. Remove from heat and season to taste with salt and pepper (I like 1/4 teaspoon salt and a pinch of pepper).

Step 4

To serve, either toss the vinaigrette with greens and sprinkle with bacon, or stir the bacon into the dressing and toss with the salad. Both ways are tasty!