Place spinach into a large serving bowl, top with hard-cooked eggs, mushrooms, 4 crumbled strips of bacon, Swiss cheese, and almonds.
Heat olive oil in a small skillet over medium heat. Stir in shallots and garlic, and cook until softened and translucent, about 2 minutes. Whisk in the vinegar, Dijon mustard, honey, and 2 crumbled strips of bacon; season to taste with salt and pepper, then cook until hot.
