Tender spinach leaves tossed with warm bacon dressing, mushrooms, and hard-boiled egg create a protein-rich, savory salad. This family-friendly classic combines fresh greens with bold, smoky flavors.
Wash and thoroughly dry the spinach leaves, then place them in a large salad bowl along with the sliced mushrooms and red onion.
Slice the hard-boiled eggs and set aside for garnishing the salad later.
In a large skillet over medium heat, cook the bacon slices until crisp, about 6–8 minutes, flipping once for even browning. Remove the bacon and drain on paper towels, reserving 3 tablespoons of bacon fat in the skillet.
To the warm bacon fat over low heat, whisk in apple cider vinegar, Dijon mustard, sugar, salt, and black pepper. Stir constantly and let the dressing gently bubble for 1–2 minutes until slightly thickened.
Immediately pour the hot bacon dressing over the spinach salad and toss quickly to wilt the leaves slightly. Top the salad with crumbled bacon and sliced eggs, then serve at once while the greens are still glossy from the warm dressing.