HEAT large skillet over high heat and ADD butter. When the butter foams, add mushrooms and STIR to coat. COOK until the mushrooms begin to brown and then sprinkle with chopped thyme and salt.
COOK bacon in a cast iron skillet until crisp. REMOVE bacon and reserve 3 Tbsp. of the rendered fat.
WHISK together oil, vinegar, shallot and garlic in a small bowl, and slowly whisk in warm bacon fat.
MEANWHILE, bring 2 to 3 inches of water to boil in large saucepan or deep skillet. ADJUST heat setting to keep liquid simmering gently. BREAK eggs, 1 at a time, into custard cup or saucer. SLIP each egg into water holding dish close to surface. COOK eggs to a soft poach – about 3 to 5 minutes or until whites are completely set and yolks begin to thicken but are not hard. (Do not stir.) LIFT eggs from water with slotted spoon; drain well.
In a large bowl, TOSS the spinach with the warm dressing. TOP with poached eggs, cooked mushrooms and bacon lardons. SEASON with salt and pepper and SERVE.
Make the dressing in a blender to skip chopping the shallot and garlic.
This recipe is an excellent source of protein, vitamin A, iron, folate and choline.